That's the acceleration due to gravity. Using sign convention and taking upwards as positive, that means that acceleration due to gravity (always taken as downwards) must be -9.8ms-2.
@Mariyam Jahangir Hey! 9.8 ms is the value of Earth's gravity. As the objects motion was upwards, the gravity was opposing it. So was used with negative sign .
@Mariyam Jahangir when you drop an object on Earth, it accelerates towards the ground at 9.8ms⁻² (ignoring the effects of air resistance). As for the negative sign, that's called 'sign convention' - deciding which direction is positive and which is negative. I take upwards to be the positive direction. Since objects accelerate downwards (the negative direction), acceleration due to gravity is taken as -9.8ms⁻²
Why would people dislike the truth about the Equations of motion everything is perfect *its slow pace to not fall behind *simple and going through each step *perfect illustration i can't see why people disliked this?
Perfect! Exactly what i was looking for. Most other videos just show how to memorize the equations, this goes under the hood. The equations make perfect sense now.
It's really a good lecture . I was able to understand very efficiently without subtitles . Would you please solve more examples in your video . That would be really helpful . Love form India !!
I'm from India 🇮🇳 and I hope our teachers would also learn from west teacher and explain the derivations not "rot" learn these equations... Btw I'm learning this in class 9th... Found your video and loved the beauty of physics... thanks sir❤
Thanks for the comment - pupils don't need to know the derivations for Higher Physics but they're not too tricky and included in the video for interest.
Thank you so much! I couldn't figure out how to get the 3rd equation, but after this explanation the 3rd and 4th seem quite obvious. Of course it's harder if you don't know how you're supposed to get there.
Dear Mr Smith, I humbly request you to make a video regarding graphs of uniform acceleration etc. I have a lot of trouble reading them and obtaining data from them. This is just a suggestion.
There is a video called 'Velocity-time graphs' - is that any use to you? If you tell me what areas the video would need to cover, it's something which I'm sure I could do at some time because it wouldn't take too much work.
Thank-you very much. My brain was very confused because of this kinematic equations of Sir Isaac Newton and was about to destroyed because no one was able to explain this concepts in simple way. You explained them very well and help me overcome my physics problems. Thank-you very much buddy!!👍
But you are more awesome than me.I am just a student whereas you are a teacher.Not just a normal teacher but an super awesome teacher.Btw you are welcome.
thank you sir !!!!!that was useful, now iam grateful that i found a teacher like you , i hope your students understand that they HAVE YOU !!!!!many thanks
Wow, thanks a ton. In the exercise only u was given and the rest you had to find out by reading the text carefully and making one assumption (taking upwards as positive). Hadn't known how to do this before watching the vid. Super content!!!
Thanks this halped me alot i have ny paper tomorrow and i was having a lot of trouble understanding this but after watching this video but now its all cleared thankyou mr smith
Sir you are the best physics teacher in my life..............simply you can explain fluently .....please doing more video .............we can understand more........sir I am the student of honours 3rd year department of mathematics.......sir you will be able taw solve mechanics 3rd year major courses..............
I have a question, i was doing homework and came across a question that said a ball being thrown vertically upwards at 4ms-1, whats the height of the ball after 2 seconds and i was writing down what i had and used a=-9.8ms-2 which gave a negative displacement, should i have taken acceleration as negative or have i done something wrong?
The full question is “a ball is thrown vertically upwards from the edge of a cliff as shown on the diagram” on the diagram shows the cliff being 33 m tall and the ball being thrown at 4 ms-1 “the effects of friction can be ignored” a) “what is the height of the ball above sea level 2 seconds after being thrown?” Thanks for the help
how did you get -9.8 for the acceleration?
please help, thanks
That's the acceleration due to gravity. Using sign convention and taking upwards as positive, that means that acceleration due to gravity (always taken as downwards) must be -9.8ms-2.
good question
@Mariyam Jahangir Hey! 9.8 ms is the value of Earth's gravity. As the objects motion was upwards, the gravity was opposing it. So was used with negative sign .
@Mariyam Jahangir when you drop an object on Earth, it accelerates towards the ground at 9.8ms⁻² (ignoring the effects of air resistance). As for the negative sign, that's called 'sign convention' - deciding which direction is positive and which is negative. I take upwards to be the positive direction. Since objects accelerate downwards (the negative direction), acceleration due to gravity is taken as -9.8ms⁻²
@@MrSmithsPhysicsonline you use calculator for these. We don't use calculator in india for such small problems.
Why would people dislike the truth about the Equations of motion everything is perfect
*its slow pace to not fall behind
*simple and going through each step
*perfect illustration
i can't see why people disliked this?
I personally love all my videos, but I guess we're all entitled to an opinion! Thanks for your positive comment.
@@MrSmithsPhysicsonline thx this helped a lot
tq uuuuuuuuuuuuuuuuuuuuuu sooooooooooooooooo muchhhhhhhhhhhhhhh sir .the best thing about u is that u r responding all the comments
I'm trying - I really appreciate the feedback. Glad you liked it!
hi sir how are u sir
Perfect! Exactly what i was looking for. Most other videos just show how to memorize the equations, this goes under the hood. The equations make perfect sense now.
Thanks for the comment!
Thanks for helping me pass my physics test 🥰
Happy to help!
Am i only the one watching in 2024 😢😅😅
Thanks for watching - this is my most popular video, so you're not the only one!
@@MrSmithsPhysicsonline thanks 😊
No you aren't my friend
We are here
Nooo
You're an absolute legend. School is closed due to Covid-19 and this is teaching me so much of the higher course for next year. Thank you!
Thank you - I'm working on new videos too. Glad they're helping.
Hi
Me too
Bhai thanx kyuki aap sabko comment bhi karte ho aur bdhiya explain bhi krte hoo
Hmesha isi 5rh krna all the best
Bhai you teach good
Thank you! I always try to reply to all comments although some of them seem to get lost at times. Glad you are finding the videos useful.
You just completed my 1 week project within 9.11/1.25min
Thank you brother
Excellent - all in a day's work!
It's really a good lecture . I was able to understand very efficiently without subtitles . Would you please solve more examples in your video . That would be really helpful .
Love form India !!
I'll certainly try to make more videos with worked examples. Thanks for the comment.
I'm from India 🇮🇳 and I hope our teachers would also learn from west teacher and explain the derivations not "rot" learn these equations... Btw I'm learning this in class 9th... Found your video and loved the beauty of physics... thanks sir❤
Thanks for the comment - pupils don't need to know the derivations for Higher Physics but they're not too tricky and included in the video for interest.
the girl who threw the ball should be a pro athlete
Maybe she is - I'll ask.
Thank you so much! I couldn't figure out how to get the 3rd equation, but after this explanation the 3rd and 4th seem quite obvious. Of course it's harder if you don't know how you're supposed to get there.
Glad the video helped. What other topics would you like to see covered?
Dear Mr Smith, I humbly request you to make a video regarding graphs of uniform acceleration etc. I have a lot of trouble reading them and obtaining data from them. This is just a suggestion.
There is a video called 'Velocity-time graphs' - is that any use to you? If you tell me what areas the video would need to cover, it's something which I'm sure I could do at some time because it wouldn't take too much work.
Excellent.
.
. teaching with nice illustration
Thank you! The illustrations can take a long time so it's nice to know that they're appreciated.
Got a new student, very well explained. This video is really helpful.Thank you sir
Thanks for the comment!
@@MrSmithsPhysicsonline welcome, sir.
My teacher never explained how to extract these, thanks so much now I can easily remember equations of motion
You don't need to know the derivations any more but I feel that it's still useful to know where they come from.
Good videos
I like it
Good I will like your suggestion
You are my favourite teacher
You're too kind!
@@MrSmithsPhysicsonline thank you sir
So glad I found your channel struggling so much with physics and need it for uni
How did you get on in the end?
It's good to see you replying for every comment .
I try to reply to them all so that I can help anyone with a problem. Glad you noticed!
Thank You very much sir. I've found good use of UA-cam.
Glad to hear that - all the best!
Very good 📔📔📔📔📔📕📕📕📕📖📖📖📖📓📓📚📚📚📚📚📚📚📚& helpful📚📚📚📚📚📚📚📗📗📘📗📘📗📘 video
Cheers - love the emojis!
Can do more example of solving problems for these equations..... It really helps us
Will do!
Thank-you very much. My brain was very confused because of this kinematic equations of Sir Isaac Newton and was about to destroyed because no one was able to explain this concepts in simple way. You explained them very well and help me overcome my physics problems. Thank-you very much buddy!!👍
Thanks for the lovely comment - all the best!
Thank you sir 🥰... from Bangladesh 🇧🇩
Thank you too!
Your video is unexplicably amazing!!!!!!
Thank you so much!!!!!!
You've obviously got good taste!
Thanks a lot, sir!!!
You're very welcome!
Tomorrow is my exam thanks for helping
Good luck!
Wow your teaching is amazing I loved it we’ll make more videos like this ❤
Moree videos in the pipeline!
Am I only one watching in 2024
You're doing well - I'm still living in the 1980s.
@@MrSmithsPhysicsonline😂 nicee
Na
Thanks for explaing it sir
Thank you - keep watching!
thank you for the example.helped a lot:D
Glad it helped!
Saw many videos on this but perfectly understood this one.
Thank you Sir for such a great explanation.
I would love to be your student
Thank you
Thanks and welcome - glad that it helped.
This teacher just solved my problems.
Glad to help - who's going to sort my problems?
OMG MY SAVIOUR...I SAW THIS AND WAS CRYING CUZ I DIDNT UNDERSTAND..MY UNDERSTANDING IN PHYSICS SUCKS....TYTY SO MUCH!!!
Physics has that effect on people sometimes - glad to help!
Glad! I found this video,my teacher is not so good . So I wasn't able to understand it, but you cleared all doubts
Glad it was helpful!
Thank you Sir! Your video really helped me in solving numericals!
Excellent - glad it helped!
Awesome 🔥
Thanks Dave & good luck with life after the football.
You are awesome.I understood it in one watch.
Thank you - you are awesome too!
But you are more awesome than me.I am just a student whereas you are a teacher.Not just a normal teacher but an super awesome teacher.Btw you are welcome.
Congrats for the great explanation! I’m 100% sure I’ll get good marks in tomorrow’s physics exam because of you sir! Love from india ❣
Hope everything went well with the exam!
Great! I got the results and got 20/25 🤩🤩🤩
how do you study??😭 i need help omg
Seriously, this is the best explanation ever.
That's the best comment ever! Thanks.
very interested...
......
.......
.....
nice way of teaching
.......
excellent teacher
Glad you liked it!
thank you sir !!!!!that was useful, now iam grateful that i found a teacher like you , i hope your students understand that they HAVE YOU !!!!!many thanks
Thank you! Glad that you're finding the videos helpful. All the best!
I found this video very helpful, thank you!
Thanks. BTW I love a good meme too.
SIR YOURE THE GOAT TYSM!!
You're too kind!
Thank you so much!
Glad you liked it!
You are a legend my friend
Thanks - takes one to know one!
thanks! This is what I need for knowing the concept of the formula
Glad you found it useful - thank you!
Thank you! This explanation was all i needed. Keep making more videos!❤
Thank you - glad you found it useful!
Thank you so much for this video, it was very useful!! I'm trying to learn these equations for the first time for my BMAT exam, you definitely helped!
Glad to have helped - good luck!
What is bmat exam ?
Hallooo army 😊
this helps alot thanks!
Glad to hear it!
Thank you Mr. Smith, it was very helpful!
Glad it helped!
Clear and brief! Also helpful example question at the end! Thank you very much!
You're very welcome! Glad you found it helpful.
Sooo nice its clear my all doubts its help me a lot.... Thanku
Glad you found it useful - thank you!
Wow, thanks a ton. In the exercise only u was given and the rest you had to find out by reading the text carefully and making one assumption (taking upwards as positive). Hadn't known how to do this before watching the vid. Super content!!!
Glad it helped! Thank you for the kind comment.
Thanks sir for the proof of kinematic equation it's really helpful
Glad you found it helpful
Everything is clear
That's the aim - glad you found it helpful.
Thanks 🐯
Glad you liked it!
Thanks this halped me alot i have ny paper tomorrow and i was having a lot of trouble understanding this but after watching this video but now its all cleared thankyou mr smith
Good luck tomorrow - fingers crossed!
Really vry helpful thanks
Thank you!
Brilliant
Glad you liked it!
Relative motions plz
I'll hopefully have one soon on relative motion - a past paper solution video.
Such an amazing lecture I've heard ever, i was facing problem in understanding the equations of motion but after this i got all of that.
Thank you very much - glad you found it useful.
Thanks a lot sir ,well explained☺☺☺
Thanks!
Thanks for helping me a day before my class test...🙏
Glad you found the channel in time for the test - hope it helped.
nice video and your vice is nice
Thank you - I'm glad that it's been helpful.
Sir I am very thankful to you
Thank you for watching - glad you liked it.
perfect ....well done
Thank you - glas you found the video helpful.
What wonderful topics
Thank you!
Please save me from higher physics hell
Save yourself - if you've started revising now then you've got time to get some serious revision in and turn it around. Good luck!
Super, reminds me of o level physics which I am beginning to need again.....thank you, very clear and helpful
O level - those were the days!
Why did you get so many dislikes when it's the clearest video explaining the equations 🤔
Nobody likes the truth! Each to their own, I suppose.
Sir you are the best physics teacher in my life..............simply you can explain fluently .....please doing more video .............we can understand more........sir I am the student of honours 3rd year department of mathematics.......sir you will be able taw solve mechanics 3rd year major courses..............
Thanks for the comment - I'm working on new videos to bring out this term.
Great Mr. SMITH
You explained it very well.
Thanks very much!😇
Glad to help!
Most thank you sir for the clear explanation
You are most welcome! Glad it helped.
So helpful
Cheers - it's taken me a while to respond, but I got there!
All the best!
I have a question, i was doing homework and came across a question that said a ball being thrown vertically upwards at 4ms-1, whats the height of the ball after 2 seconds and i was writing down what i had and used a=-9.8ms-2 which gave a negative displacement, should i have taken acceleration as negative or have i done something wrong?
I get an answer of -11.6m which means that the object would be 11.6m below its starting position (if possible). What's the full question?
The full question is “a ball is thrown vertically upwards from the edge of a cliff as shown on the diagram” on the diagram shows the cliff being 33 m tall and the ball being thrown at 4 ms-1 “the effects of friction can be ignored” a) “what is the height of the ball above sea level 2 seconds after being thrown?” Thanks for the help
Joe?
Very helpful 😀Thankx!
Thanks, Astrophile!
Wonderful sir!!!
Mind blowing derivation SMITH sir....
Thank you - glad you found it useful!
@@MrSmithsPhysicsonline it's ok sir
Alright
thanks :)
You're Albert Einstein why are you here. You should be teaching HIM not the other way around.
ha ha ^^
Thanks for all your work, Albert - it's been an inspiration!
How can we find ( u ) ?
From which equation? Maybe I should make a video on rearranging equations?
thanks .it was helpful .
Great - glad that you found it helpful.
@@MrSmithsPhysicsonline i commented 3yrs back xd i m in 12th now and now i got the reply haha
Helped me a lot
Thank you!
good sir
Good comment - thanks!
this is the first time I comment on UA-cam and thx so much bro cuz tomorrow is my exam and this video really help me a lot
All the best with the exam! Glad it's helped you.
verreeey helpfull and easy
Easy - you've obviously understood it well!
It's amazing
My all doubts are cleared
Good stuff! Thank you for the comment.
Thank you very much mr. Smith
Glad it helped - thank you!
Great video
Thank you!
sir how we will get to know that v- u in height of triangle?
It might be easier to imagine some values - say u=6m/s and v=10m/s. The height of the triangle must be 4 ie 10-6. Hope this helps!
thanks sir you are the best teacher in the world
I agree!
Mr Smith.. u r awesome...😊😊..
excellent explanation!
Thank you - glad you liked it.
from nepal😍
Welcome from sunny Scotland!
very nice teaching
Very nice commenting!
hey he's foreign that's lit
From Scotland - ya dancer!
Genius!, you have a gift!
True that!
8:03 how many of you guys laughed hardly🤣🤣🤣🤣
Was it when I said "now that's a big number". Sounded quite funny listening back to it after all this time.
@@MrSmithsPhysicsonline no sir I just posted for fun sorry 🥰
It's all good - maybe it had some people going to that point which looks good to UA-cam.
@@MrSmithsPhysicsonline NICE TO🥰 MEET YOU , ARE YOU FROM WHERE??
From sunny Scotland.
This video was really helpful for me. Thanks a lot for making this video
Glad it was helpful!
Wonderful video ,very well explained ,if same give a like
Thank you!
Sir really a great vid
Helped me a lot
Glad to hear that - any other topics you'd like to see covered?
thanks for this epic vid understood how to derive thanks to you
No problem! It's a tricky job deriving the equations but I think the animations help.