Physics - What Is The Difference Between Mass and Weight?
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- Опубліковано 1 вер 2017
- This physics video tutorial explains the difference between mass and weight. In addition, it discusses how to calculate the force of gravity acting on an object given its mass and how to calculate the gravitational acceleration given the mass and weight force.
Newton's 1st Law of Motion:
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Newton's 2nd Law of Motion:
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Newton's 3rd Law of Motion:
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Mass Vs Weight:
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Normal Force Problems:
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Elevator Physics Problem:
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What Is a Normal Force?
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Static Friction and Kinetic Friction:
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The 4 Fundamental Forces:
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Physics Forces Review:
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I am preparing for my exam, and this made me understand it 10 times better than the book! Thanks!
I'm kindly asking for the book... My data tariff is killing me 😢
@@josephsipalo-tr4vb idk any book releated to this I just watched the video it is a great explanation.
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Well yes a heavier object may extend the spring more but are they getting any further and what damage is done to the springs and none of these accounts for energy output does it
how did you do it can you share with me , thank you
Certo good
I have a question. Is weight "always" proportional to mass? or it just proportional when the acceleration due to gravity is constant? This is pretty confusing for me because as mass increases so do weight, does that means they are "always" proportional?
@Husayn Ahmed Year 8 I got this question wrong in my assignment =)))
@Husayn Ahmed Year 8 the force of gravity is always the same. all problems we solve in physics we neglect the air resistance. but in real life the air resistance is there and that's why heavier objects fall faster than less heavier ones and the gravity is still 9,8
@@catluong9660 Since gravity is close enough to uniform, we treat gravity as a constant. This means if mass is the ONLY thing we change, then mass and weight are proportional to each other.
For a more general application, we'd need more information about the two situations you are comparing, to conclude whether mass and weight are proportional to each other. Usually when we have a formula like this, and we are asking about a proportional relationship between two variables, it is implied (unless other information is given), that we are holding constant, the one we didn't mention.
But gravity is still just a theory. So this lesson is useless
Pls anyone help me this
If you want to measure mass, what are the steps you need to follow?
first of all you need to write this equation: F=mg where m is mass and F is as same as weight
You either:
A: Place it on a scale and measure how much the scale is either squeezed or stretched. From the known spring constant, you then know the support force. The support force equals the weight to keep it at rest. If you do this in a known gravitational field, you divide by the gravitational field to get its mass.
B: Place it on a balance, and compare the torque due to its weight, with the torque due to a reference weight. The mass of the reference weight, scaled appropriately for the geometry of the balance will tell you its mass.
C: Allow it to oscillate on a spring of known stiffness. Measure the vibration period (T). Using T=2*pi*sqrt(k/m) and the known spring stiffness (k), you can solve for the mass (m). This is how it is done on the international space station.
What's the 1.7m/s2 for though?
It's the free fall acceleration of gravity on the moon.
Here I am right before a physics test
@2:14 so that's why a pearson can 'leap' on the moon? Less W force and thus also slower fall?
LOL! hahaha 5 sec later.. the exact questions awnsered hahahahaha
What is g representing I think it's not gram so what is mg
M=mass in kg
G=gravity
W=mg
W=(mass)(gravity)
Gravity is usually 9.8
g as a variable represents gravitational field strength. A property of an astronomical body that tells matter which direction to experience a force, and how much force per unit mass to experience. Because both the force and inertia are proportional to mass, it also tells us acceleration when no other forces come in to play.
It is just a coincidence that as a unit, it also represents grams. You have to keep track of when it is a unit, and when it is a variable name, as they are not interchangeable.
This man needs to get a better mic
you need to wash out your ears
In order to find the number for mass, what equation did you use with 9.8 to find m= 102.2 kg? I am not sure what I am missing. Thank you for your help!
1001.25 N divided by 9.8 equals 102.2 kg
Derive tbe formula from Weight= mass x gravity so the weight that we got was 1,001.25=mass x (9.8) to get mass, divide gravity from weight so it will beee, 1,001.25/9.8= 102.2kg( mass)
Science book says things are lighter the further from the ground of earth centre?????
And a lighter object can extend the spring less than heavier, maybe it doesn't have to, but does that make sense so a heavier object will extend the spring more ????? And mass, the books say the mass stays the same wherever it is, um doesn't it depend on how much matter, the greater the matter the more difficult to move yes but you can have not much matter and still not do much right, idk and the density well hmm anyhoo, I was thinking west we count ass, east we count mas or at least mass is not one word, thankyou for your video
mass charge.
Really 1lbs is 4.45, i think 1lbs is 0.45?
Why is it that the moons gravity is different from other sources?
@@boboganbobogan9297 woah. Ty for that. I just meant when u google it 😂
@@jmjimenez9701 ooh, i got it wrong
Gravitaional force is 9.81
ua-cam.com/video/39PPIzdm19M/v-deo.html
mass & weight dichotomy
3:48 ~ "The number of atoms". Ok, mass is not volume. It's kinda confusing for non-physicists. Would you just give a freaking definition in the beginning of the video?
He has a video. Start with the basic ones before getting to complicated ones. Atom is simply what makes up an object.
@@purplemint11 I just stumbled here. I don't care much.
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