yes, so if your doctor asks for you weight just say "637 newtons" and when they say "oh no I meant in kg" you can say "oh you wanted my mass not my weight, it's 65 kg" :D
Doctors use a physician's balance for measuring your mass. They use a method that doesn't care what the acceleration of gravity is, because the device compares your weight to the weight of the reference mass sliders.
yup my final is also in abt 12 hours also and didnt under stand mass and weight so i would kindly like to say "YOU SIR DESERVE SOME KIND OF "AMAZING PERSON WITH AMAZING TIMING AWARD." i honestly cant that you enough.
Im really glad that you have videos like this, i felt so confused by kg because i kept thinking about weight, but once you put it in terms of the imperial system it all clicked. Thank you so much
@@zoe-hc6nf The astronauts weighed about 1/3 of their Earth weight when on the moon, after you account for the massive space suits they had to wear. Those space suits doubled the mass of the astronauts, compared to the astronauts' masses in ordinary street clothing.
Thanks sir because of you i am prepared for my physics exam (which is tommorow) Thank you so much for this resource (Please wish me best for tomorow's exam)
Because the elevator accelerates downwards, during which time the resulting acceleration from gravity becomes less and your weight reduces. Once the elevator has a constant speed, you will have your normal weight again, becoming larger when the elevator slows down to stand still.
You said people give their "weight" to others instead of their mass, as if that's wrong, but I thought scales take into account gravity. In which case, we're not wrong to give our weight.
@CliveReyes Sal doesn't read the comments.... But because the people who make the scale expect that everyone will be right near the surface of the earth, they expect that the acceleration will be the same. Because of this, they can cut out the middle man and calculate guess you mass, even though it measures weight. If you go to the moon, you will still mass at 70 kg, but the scale will wrongly say you have less mass, when really you just have less weight. Makes sense?
Can you give me this formula right now? "A certain force accelerates a 3.6 kg mass by 1.4m/s². What would be the acceleration of 2.2kg mass when the same force acts on it";
He uses kilograms because that's the unit for mass in physics. In fact it's critical that you use kilograms if you want to get the correct numbers when several different quantities are involved.
So why is the force of gravity in space is different and lesser than the magnetic force of gravity on earth?What keeps objects in space floating and objects on earth attracted to the surface of the earth.Phydics is all about manipulation of electric and magnetic field which are created by electric and magnetic charges described as positive and negative charges vibrating with different rate and spectrum of atomic mass energy frequency.
So you determined your mass by using a scale that measures your mass based on the gravity of earth then you turned around and added that force back to the measurement that was created by it in the first place.
i want the answer in metic units! not slugs. my professor isnt going to accept slugs as an answer. i just need to convert weight to mass. in metric units
If weight changes because of gravity force then How do you know that your mass is 70 kg as it the result of gravity of earth. How do we know the real mass. ? Did you get what i am trying to ask?
he uses kilograms because in physics, universally, the metric system is used since it makes more sense. Even in America, when doing physics, people use the metric system.
Sir one thing which I didn't understand tha if mass is constant then how we could calculate the weight will be changed mean again 9.8 ×50 will be remaining same every where in the gravetional feild premises
@Zenoniel Thank you very much.. now I understand, so the scale was made to work just under the gravity of earth.. and it wouldn't work properly under any change of gravity.. Thanks again, I appreciate it (:
I think you're mixing up units here, Metric and SI systems are not the same thing! Though SI is based on metric. kg-force from metric system (which is a measure of weight) is often confused with kg, SI unit for mass. When people are using kilograms to indicate their weight they are using metric kg-force not kg-mass from SI system.
you do indeed have many nuclear reactions going on inside you that could change your mass. working out burns calories. or storing fat increases fat reserves essentially changing your weight.
Would be correct, but only a few would understand what you are talking about. The pound in the SAE system of units, originate from the Dark Ages (13th century), when only weight and force were known, not mass. Time for Americans to become modern (like in Europe), using the SI system of units instead!
You DON'T weigh less going down an elevator. Your APPARENT weight is what changes. The only reason you FEEL weight is because of those forces which oppose gravity. In an elevator, that would be the force with which the floor pushes you up. This is not your actual weight, but your apparent weight. Weight is literally the force due to gravity, and the force due to gravity cannot be felt. Any apparent changes in weight are just a change in the normal force (reaction force to gravity).
You cannot feel your true weight, and you cannot measure the difference between whether part of your weight is nullified by a downward acceleration or whether gravity really is less. You can only measure the constraint forces, and your instinct is to assume the constraint forces oppose the force of gravity.
@@carultch 1) You are responding to an 8-year-old comment 2) Why are you even responding at all? Nothing you are saying in any way contradicts what I said........8 years ago....
But when I stand on a scale it gives me "70 kg", isn't that supposed to express my weight? Because if there were no gravity that scale would give me 0 kg, while mass is not supposed to change with gravity.. I hope you answer me.. Thank you very much, you're great.
Achmed scales(bathroom , springs)measure weights(force) and convert it to mass by dividing it by 9.8 (m=F/a) , m=686/9.8=70 kg , On the moon , the scales that are designed with respect to the gravity of the earth reads your mass=114/9.8=11.6 kg , it correctly measures your weight but divid it by a wrong factor which should have been 1.62 so your actual mass is 114/1.62 = 70 kg So next time you go to the moon,don’t forget to calibrate the factor from 9.8 to 1.62
I would like to know the digital or graphics pad on which the gravity drawings and writings are shown in this video. Could someone tell me the technology or point me in the right direction? Thanks and Regards
Both the moon's reduction of mass and reduction of radius are accounted for, when we divide by 6. The Earth is about 80 times the mass of the moon, and about 3.65 times the radius. 1/80 / (1/3.65)^2 = 6.
Wait a minute. Why would you multiply 70 kg by 9.81 to get Newtons, then divide 160lb by 32.2.to get slugs. It makes sense to me to divide 70 kg by 9.81 to get 7.13. That way F( weight) would equal mass(7.13) times acceleration(9.81). Unless Kg are a measure of mass and Lb are a measure of weight. I don't get how mass can even have units.
I found out why your math is different for Newtons and Slugs. You used two different systems in your calculations. You used (SI) which is an Absolute system to calculate Newtons. The British equivalent is the Poundal not the Slug. The Slug is a Gravitational system. Someone please verify what I am saying. I found my Answer in an Engineering book not a Physics book.
Not divided by your local g, but divided by the global average value of g, which is 9.80665 N/kg. If not otherwise specified, g is assumed to be 9.8 N/kg in a Physics problem, since anything more precise than that number will depend on knowledge of where the experiment happens.
1 kg = 2.2 pounds, *on the surface of the earth*. Take that same kg to other planets and you'll get a different weight. It will still be one kilogram of mass, however.
We use the units of pounds interchangeably as force and mass units, and apply either an f or an m as a subscript to specify, when necessary to clarify it (lbf or lbm). By definition, the pound-mass is defined directly from the kilogram. The pound-force is defined to be the weight of a 1 pound-mass object in Earth's global average gravity of 9.80665 N/kg.
When you 'weigh' yourself on a scale does gravity affect what the outcome is? for example, if I have 1 mole of carbon which is about 12g, will it still be 12g if I weighed it on a scale anywhere in the universe?
Ethan Palinkas ,bo it wont be.Different planets in the universe will have different gravitational forces producing different weights.The mass will remain constant tho'.
It depends on what you mean by "scale". If by scale, you mean balance, then the answer is no. A balance is gravity-agnostic in its methods for measuring mass. It measures mass by comparing the sample measured, to the reference masses. As long as there is a gravitational field, the gravitational field "cancels out of the equation", and the measurement is independent of the gravitational field strength. A triple beam balance and a physician's balance are two examples of such devices. By contrast, if you mean a scale that compares the measured weight to another force, like the reaction force from a spring, its read-out will depend on the gravitational field. We often use the terms balance and scale interchangeably, which adds to the confusion. The essential difference is whether the measured weight force is compared to a reference weight, or compared to another kind of force. There is a way to measure mass without depending on gravity, and that is what they do in spacecrafts. The astronaut grabs onto a chair that is connected to the spacecraft by a spring, and measures the period of vibration. From the measured period of vibration, you can rearrange the equation of motion and solve for the unknown mass.
The rate of change in position, is change in position over change in time, which we call velocity. There is one instance of time in the denominator, hence velocity has the units meters/second. Take the rate of change again to get acceleration. Now we have the seconds in the denominator twice. This is why the seconds are squared in the units of acceleration.
Why do you multiply your supposedly 'mass' by 9.8 m/s^2 when that value has already been subjected to the influence of gravity; and you multiply again the influence of gravity to get the value of weight? In actuality, the mass (uninfluenced by gravity) should be 70 kg divided by 9.8 m/s^2 which is approximately only 7 kg.!
By definition, 1 kg of force is the weight of a 1 kg object on Earth, assuming the global average gravitational field. If your spring scale is calibrated in kilograms, the unspoken subtext is kilograms-force, you are measuring your weight as a proxy to measure your mass, and the underlying assumption is that the scale is being used on Earth. If instead of using a spring scale to measure weight, you were to use a balance, the gravity is already cancelled out of the equation. Balances work by comparing the measured weight to the weight of reference masses (the sliders), and will measure the same value regardless of what the gravitational field is, as long as there is one. The unit of the Newton was coined so that F=m*a could have its elegance and simplicity, such that we have a force unit, a mass unit, and an acceleration unit that are consistent between the three of them. By definition, a 1 kg object subject to a 1 Newton net force will accelerate at 1 m/s^2. Earth's acceleration of gravity in free fall is much larger than 1 m/s^2, and is 9.8 m/s^2 unless specified otherwise. Thus, a 1 kg object is subject to a force of gravity on this planet of 9.8 Newtons. Most scales are calibrated in a weight unit that matches the mass unit familiar to the end-user, and don't bother with force units like Newtons. Outside of a scientific context, that is what means the most to the average person.
Depends on what kind of bathroom scale you have. If you are using a physician's balance that compares your weight to the weight of a reference mass, it will be directly telling you your mass, and it would give you the same measurement even if you used this device on the moon. Gravity "cancels out of the equation" when we use a balance for mass measurement, because both the sample being measured and the reference masses are subject to the same gravitational field. By contrast, if you use a spring scale, it is telling your weight in units of kilogram-force units, which are defined to be the weight of a 1 kg mass at the standard value of Earth's gravity (9.80665 N/kg), which is based on the global average value of g. Your weight is being used as a proxy to measure your mass, when you use a spring scale.
Sal u told that our mass does not change Then how about time period when I was a baby,at that time my mass would be much less as compared to what it is now. That tells that my mass must have changed , how is that possible?
You must be misunderstood. Yes, you're mass will change from being a baby, to being a full grown adult, it's inevitable. But you're mass doesn't change anywhere in the universe because mass is constant meaning it doesn't change, you will have the same mass where ever you are, even though different gravitational strengths will be acting on you in different parts. On Earth, you're mass is 70kg (for example), and on the moon, you're mass is still 70kg.
You forgot to mention that if you were on a mountain, although you weight will be less because you are further from the center of the earth, you have greater weight due to the gravitational attraction of the mountain below you. Ultimately, it would probably come close to cancelling each other out (forgot how to calculate the Bouguer anomaly for this, but it's not too difficult if I remember my geophysics correctly).If the mtn were next to you at sea level,u would weigh less due to force of mtn.
Yes, local geological features can impact your weight, but they are a second order factor compared to distance from the center of the Earth as a whole. Measurements show that high elevation generally means less gravitational field.
YOU SIR DESERVE SOME KIND OF "AMAZING PERSON WITH AMAZING TIMING AWARD." my final is in about 12 hours.
i honestly cant that you enough.
how'd you do
U graduated?
If anyone asks how much I weigh I'm going to tell them 725 newtons.
Bazinga!
OR
74 Kilogram-force
Cringe
Hi
@@raibirsingh9016 You are cringe
@@raibirsingh9016 You are cringe
"assuming that you don't have some type of nuclear reaction going on inside of you" xD
xD??
Yes,this one was superb😂
yes, so if your doctor asks for you weight just say "637 newtons" and when they say "oh no I meant in kg" you can say "oh you wanted my mass not my weight, it's 65 kg" :D
Doctors use a physician's balance for measuring your mass. They use a method that doesn't care what the acceleration of gravity is, because the device compares your weight to the weight of the reference mass sliders.
This was the explanation I was looking for. I found two other videos that just didn't get to the point.
Good job mate!
yup my final is also in abt 12 hours also and didnt under stand mass and weight so i would kindly like to say "YOU SIR DESERVE SOME KIND OF "AMAZING PERSON WITH AMAZING TIMING AWARD." i honestly cant that you enough.
why teach imperial when the rest of the world uses metric in physics... this is how rockets fail my friend.
great video series btw.
Im really glad that you have videos like this, i felt so confused by kg because i kept thinking about weight, but once you put it in terms of the imperial system it all clicked. Thank you so much
I`ve to say, this video was more practical and understandable than the explanation I received at university. Thanks a lot, for sharing
Hon, you need to loose some newtons. Ill book you a flight to the moon.
Lmao hahaha
@@zoe-hc6nf The astronauts weighed about 1/3 of their Earth weight when on the moon, after you account for the massive space suits they had to wear. Those space suits doubled the mass of the astronauts, compared to the astronauts' masses in ordinary street clothing.
thank you for teaching us! its very helpful to my test and i got perfect because of you!!
Thanks sir because of you i am prepared for my physics exam (which is tommorow) Thank you so much for this resource (Please wish me best for tomorow's exam)
thank you so much
Because the elevator accelerates downwards, during which time the resulting acceleration from gravity becomes less and your weight reduces. Once the elevator has a constant speed, you will have your normal weight again, becoming larger when the elevator slows down to stand still.
Hey, Sal. The end of the video, when you are talking about slags is mindblowing (:. Thank you!
The simple fact that this is not common knowledge, renders the educational system to be below all criticism.
can you make cupcakes
You said people give their "weight" to others instead of their mass, as if that's wrong, but I thought scales take into account gravity. In which case, we're not wrong to give our weight.
how much do you weigh? 9.8 meters per second squared times 70 kilograms ._.
"how something to a give force"
thank you for teaching me fraction and mass!!!!!!!!!☺☺☺☺☺☺
Thankyou so much..👍
@CliveReyes Sal doesn't read the comments.... But because the people who make the scale expect that everyone will be right near the surface of the earth, they expect that the acceleration will be the same. Because of this, they can cut out the middle man and calculate guess you mass, even though it measures weight. If you go to the moon, you will still mass at 70 kg, but the scale will wrongly say you have less mass, when really you just have less weight. Makes sense?
Can you give me this formula right now? "A certain force accelerates a 3.6 kg mass by 1.4m/s². What would be the acceleration of 2.2kg mass when the same force acts on it";
That's incredibly confusing to use weight for one system and mass for another
simple but good
He uses kilograms because that's the unit for mass in physics.
In fact it's critical that you use kilograms if you want to get the correct numbers when several different quantities are involved.
sal .
you are awesome ...
7:11
You are awesome man !
So why is the force of gravity in space is different and lesser than the magnetic force of gravity on earth?What keeps objects in space floating and objects on earth attracted to the surface of the earth.Phydics is all about manipulation of electric and magnetic field which are created by electric and magnetic charges described as positive and negative charges vibrating with different rate and spectrum of atomic mass energy frequency.
So you determined your mass by using a scale that measures your mass based on the gravity of earth then you turned around and added that force back to the measurement that was created by it in the first place.
i want the answer in metic units! not slugs. my professor isnt going to accept slugs as an answer. i just need to convert weight to mass. in metric units
If weight changes because of gravity force then How do you know that your mass is 70 kg as it the result of gravity of earth. How do we know the real mass. ? Did you get what i am trying to ask?
he uses kilograms because in physics, universally, the metric system is used since it makes more sense. Even in America, when doing physics, people use the metric system.
Sir one thing which I didn't understand tha if mass is constant then how we could calculate the weight will be changed mean again 9.8 ×50 will be remaining same every where in the gravetional feild premises
Where did you get that TI85 app?
you are amazing!
I am 980 Newtons and I have eaten way more that 980 of those delicious cookies in my lifetime.
Stood on the scales in a neuclear reactor :) oooo...
love your voice :)
And sense of humor, and math expertise,...
@Zenoniel Thank you very much.. now I understand, so the scale was made to work just under the gravity of earth.. and it wouldn't work properly under any change of gravity..
Thanks again, I appreciate it (:
Your mass won't change ...much.
Your mass can change if you eat more or burn calories
I like this vid
I think you're mixing up units here, Metric and SI systems are not the same thing! Though SI is based on metric.
kg-force from metric system (which is a measure of weight) is often confused with kg, SI unit for mass. When people are using kilograms to indicate their weight they are using metric kg-force not kg-mass from SI system.
ur proving khan academy wrong. How dare u
(all jokes)
@Zenoniel Thank you very much (:
My mass does not change??
Time to eat pizza XD
Then what is the difference between density and mass
+Rajiv Saxena Density is mass per unit of volume.
aka volumetric mass.
If it is showing 40kg when I stand on a scale so 40kg is my weight or mass
plot twist: i have a nuclear reaction going on inside of me.
how will it affect my mass/weight?
It will definetly affect your monthly bill of toilet papers.
you do indeed have many nuclear reactions going on inside you that could change your mass. working out burns calories. or storing fat increases fat reserves essentially changing your weight.
Mass= 0 cause your insides are burnt out
@cohen_laundry: it's called chemical reaction not nuclear reaction.
@@lamyanbathongam1561 you didn't watch the video
Thumbs up for "unless you're having a nuclear reaction inside of you" !!
Would be correct, but only a few would understand what you are talking about. The pound in the SAE system of units, originate from the Dark Ages (13th century), when only weight and force were known, not mass. Time for Americans to become modern (like in Europe), using the SI system of units instead!
You DON'T weigh less going down an elevator. Your APPARENT weight is what changes. The only reason you FEEL weight is because of those forces which oppose gravity. In an elevator, that would be the force with which the floor pushes you up. This is not your actual weight, but your apparent weight. Weight is literally the force due to gravity, and the force due to gravity cannot be felt. Any apparent changes in weight are just a change in the normal force (reaction force to gravity).
You cannot feel your true weight, and you cannot measure the difference between whether part of your weight is nullified by a downward acceleration or whether gravity really is less. You can only measure the constraint forces, and your instinct is to assume the constraint forces oppose the force of gravity.
@@carultch 1) You are responding to an 8-year-old comment
2) Why are you even responding at all? Nothing you are saying in any way contradicts what I said........8 years ago....
@@willoughbykrenzteinburg isn't it nice to be able to read a year old comment?
IN AMERICA I TALK ABOUT POUNDS.
Sal, I don't understand why the US isn't metric.
Just don´t forget to say newton at the end...
reading the title i didnt think i was gonna learn as how as i did lol
But when I stand on a scale it gives me "70 kg", isn't that supposed to express my weight? Because if there were no gravity that scale would give me 0 kg, while mass is not supposed to change with gravity..
I hope you answer me.. Thank you very much, you're great.
Achmed scales(bathroom , springs)measure weights(force) and convert it to mass by dividing it by 9.8 (m=F/a) , m=686/9.8=70 kg ,
On the moon , the scales that are designed with respect to the gravity of the earth reads your mass=114/9.8=11.6 kg , it correctly measures your weight but divid it by a wrong factor which should have been 1.62 so your actual mass is 114/1.62 = 70 kg
So next time you go to the moon,don’t forget to calibrate the factor from 9.8 to 1.62
I would like to know the digital or graphics pad on which the gravity drawings and writings are shown in this video. Could someone tell me the technology or point me in the right direction? Thanks and Regards
ur mass will be 70 divided by 9.8. that will be ur body mass. if u get 70kg from bathroom scale or something like that
Big G = 0.00000000006667 N !
His mass can't be 70kg 'cause that is calculated on a weighting scale and if you did that on the moon it would be different
My weight on the surface of the earth is 622.76N!
wouldn't (r) change if you are on the moon? because its the distance from the centre right? or is that accounted for when we divide by 6?
Both the moon's reduction of mass and reduction of radius are accounted for, when we divide by 6. The Earth is about 80 times the mass of the moon, and about 3.65 times the radius. 1/80 / (1/3.65)^2 = 6.
what application/program is used for these lectures?
Wait a minute. Why would you multiply 70 kg by 9.81 to get Newtons, then divide 160lb by 32.2.to get slugs. It makes sense to me to divide 70 kg by 9.81 to get 7.13. That way F( weight) would equal mass(7.13) times acceleration(9.81). Unless Kg are a measure of mass and Lb are a measure of weight. I don't get how mass can even have units.
I found out why your math is different for Newtons and Slugs. You used two different systems in your calculations. You used (SI) which is an Absolute system to calculate Newtons. The British equivalent is the Poundal not the Slug. The Slug is a Gravitational system. Someone please verify what I am saying. I found my Answer in an Engineering book not a Physics book.
Sheesh, 200+ years later, we're still fighting the English...
I am in year 7 but I almost know everything he is saying
How does convert energy into in mass
Can you even do that?
so, a scale that measures in kg is measuring what?
weight in newtons divided by g? or something else.
Not divided by your local g, but divided by the global average value of g, which is 9.80665 N/kg.
If not otherwise specified, g is assumed to be 9.8 N/kg in a Physics problem, since anything more precise than that number will depend on knowledge of where the experiment happens.
why is pounds considered weight while kilograms is considered a mass? aren't they both the same? 1 kg = 2.2 pounds.
1 kg = 2.2 pounds, *on the surface of the earth*. Take that same kg to other planets and you'll get a different weight. It will still be one kilogram of mass, however.
That equality between pounds and kg is true on earth. Not on the moon, for example.
We use the units of pounds interchangeably as force and mass units, and apply either an f or an m as a subscript to specify, when necessary to clarify it (lbf or lbm). By definition, the pound-mass is defined directly from the kilogram. The pound-force is defined to be the weight of a 1 pound-mass object in Earth's global average gravity of 9.80665 N/kg.
When you 'weigh' yourself on a scale does gravity affect what the outcome is? for example, if I have 1 mole of carbon which is about 12g, will it still be 12g if I weighed it on a scale anywhere in the universe?
Ethan Palinkas ,bo it wont be.Different planets in the universe will have different gravitational forces producing different weights.The mass will remain constant tho'.
It depends on what you mean by "scale". If by scale, you mean balance, then the answer is no. A balance is gravity-agnostic in its methods for measuring mass. It measures mass by comparing the sample measured, to the reference masses. As long as there is a gravitational field, the gravitational field "cancels out of the equation", and the measurement is independent of the gravitational field strength. A triple beam balance and a physician's balance are two examples of such devices.
By contrast, if you mean a scale that compares the measured weight to another force, like the reaction force from a spring, its read-out will depend on the gravitational field. We often use the terms balance and scale interchangeably, which adds to the confusion. The essential difference is whether the measured weight force is compared to a reference weight, or compared to another kind of force.
There is a way to measure mass without depending on gravity, and that is what they do in spacecrafts. The astronaut grabs onto a chair that is connected to the spacecraft by a spring, and measures the period of vibration. From the measured period of vibration, you can rearrange the equation of motion and solve for the unknown mass.
Next time someone asks me how much I weigh, I'll say 5 slugs! haha :)
If my mass is 60 kg and if it doesnot change then why do I weight less going down an elevetor,,,,,,,,,,,, Few questions needed to be clearified
Why dont small g have 9.8m/s rather than 9.8m/s^2. do time have area like m and m^2 , i am not getting what is second square please explain me.
The rate of change in position, is change in position over change in time, which we call velocity. There is one instance of time in the denominator, hence velocity has the units meters/second.
Take the rate of change again to get acceleration. Now we have the seconds in the denominator twice. This is why the seconds are squared in the units of acceleration.
you repeat things a lot... but thanks for the help! :)
Why do you multiply your supposedly 'mass' by 9.8 m/s^2 when that value has already been subjected to the influence of gravity; and you multiply again the influence of gravity to get the value of weight? In actuality, the mass (uninfluenced by gravity) should be 70 kg divided by 9.8 m/s^2 which is approximately only 7 kg.!
By definition, 1 kg of force is the weight of a 1 kg object on Earth, assuming the global average gravitational field. If your spring scale is calibrated in kilograms, the unspoken subtext is kilograms-force, you are measuring your weight as a proxy to measure your mass, and the underlying assumption is that the scale is being used on Earth.
If instead of using a spring scale to measure weight, you were to use a balance, the gravity is already cancelled out of the equation. Balances work by comparing the measured weight to the weight of reference masses (the sliders), and will measure the same value regardless of what the gravitational field is, as long as there is one.
The unit of the Newton was coined so that F=m*a could have its elegance and simplicity, such that we have a force unit, a mass unit, and an acceleration unit that are consistent between the three of them. By definition, a 1 kg object subject to a 1 Newton net force will accelerate at 1 m/s^2. Earth's acceleration of gravity in free fall is much larger than 1 m/s^2, and is 9.8 m/s^2 unless specified otherwise. Thus, a 1 kg object is subject to a force of gravity on this planet of 9.8 Newtons.
Most scales are calibrated in a weight unit that matches the mass unit familiar to the end-user, and don't bother with force units like Newtons. Outside of a scientific context, that is what means the most to the average person.
Sal I know you're trying to educate but by teaching them imperial you're only encouraging it! They need to move on!
thumbs up if your looking at this video for Mrs. miret
انت اكثر من رائع اتمنى لكم التوفيق
ارجوا ان تخبرني ما اسم البرنامج الذي تشرح عليه
no
haha, next time someone asks me what my weight is i will answer 686 Newton
So mass is density....
Density changes with volume..
woooooow
@funnybleh Please do not ruin parts of the video.
@nhmllr725 Yes it does.. thank you (:
Sso when I step on a bathroom scales and it shows I am "65 kg" ,,,so that's my mass?
I think so.
Depends on what kind of bathroom scale you have. If you are using a physician's balance that compares your weight to the weight of a reference mass, it will be directly telling you your mass, and it would give you the same measurement even if you used this device on the moon. Gravity "cancels out of the equation" when we use a balance for mass measurement, because both the sample being measured and the reference masses are subject to the same gravitational field.
By contrast, if you use a spring scale, it is telling your weight in units of kilogram-force units, which are defined to be the weight of a 1 kg mass at the standard value of Earth's gravity (9.80665 N/kg), which is based on the global average value of g. Your weight is being used as a proxy to measure your mass, when you use a spring scale.
is slug not used in shotgun ammo.
I will say that my weight is 882 kilogram-meters per second squared.
Sal u told that our mass does not change
Then how about time period when I was a baby,at that time my mass would be much less as compared to what it is now.
That tells that my mass must have changed , how is that possible?
You must be misunderstood. Yes, you're mass will change from being a baby, to being a full grown adult, it's inevitable. But you're mass doesn't change anywhere in the universe because mass is constant meaning it doesn't change, you will have the same mass where ever you are, even though different gravitational strengths will be acting on you in different parts. On Earth, you're mass is 70kg (for example), and on the moon, you're mass is still 70kg.
my mass = weight(metric) / 9.8m/s^2 ?
now I know I ave always been grammatically incorrect!!!
I weigh 833 N
so if your mass is 70kg on earth, your weight in pounds is 2240 lbs? yep, thats gota be a Guinness World Record 0_o lol
what is the apple mass 100g,10g,500g .give me ans must thanks.I am new
What?
*oblate spheroid. just fyi
You forgot to mention that if you were on a mountain, although you weight will be less because you are further from the center of the earth, you have greater weight due to the gravitational attraction of the mountain below you. Ultimately, it would probably come close to cancelling each other out (forgot how to calculate the Bouguer anomaly for this, but it's not too difficult if I remember my geophysics correctly).If the mtn were next to you at sea level,u would weigh less due to force of mtn.
Yes, local geological features can impact your weight, but they are a second order factor compared to distance from the center of the Earth as a whole. Measurements show that high elevation generally means less gravitational field.
Correction, not 5 slugs. If your mass is 70 kg (154 lbs), your weight is 4800 slugs.
A quick second opinion on google shows that a "Slug" is a unit of measure for 32.1740 lb (14.59390 kg)... Sooo yeah. He doesn't weigh 154435.2 lbs...
sal why don't you have quantum mechanics or nuclear physics
too complex
+Glen Gaming (GlenOfImaal) just the basics man
I weigh 5 newton's
So you have a mass it 0.51kg?
he uses kilograms does he live in america?