Work done by a Spring - Deriving Elastic Potential Energy

[@boboganbobogan9297]

THANK YOU!!! ❤️With the last part of the video, you have cleared up all my confusion about elastic potential energy

[@FlippingPhysics]

I'm so glad!

[@mykeyboardismelting6856]

For anyone who is confused I think the reason he integrates with bounds of 0 and -0.042 instead of the position values given is because Spring Force is defined as a function of displacement and not position. So you have to adjust those bounds to get the area underneath the force vs displacement graph

[@antonytomy7215]

great job helping students

[@lukeLego]

Thanks a lot.. helped me a lot for school examinations

[@FlippingPhysics]

You are welcome

[@thelookingcat]

Hi Mr P! You're a really great hero to all of us physics 1 students! Thank you for all you do! Also Billy sounds a bit different today. Is he doing well? 🙂

[@FlippingPhysics]

I think Billy had a cold. He's better now.

[@bobbysmith3981]

This is a great video, but I was also wondering if you could post more videos about AP Physics 2 topics since your AP Physics 1 videos helped me get a 5 on my AP exam. Thanks

[@FlippingPhysics]

Someday, Yes. However, right now I am working through the AP Physics C: Mechanics curriculum.

[@arhantbagde8037]

Amazing lecture 👍👍 ......cheers !!!

[@FlippingPhysics]

Thank you! Cheers! (Back at ya)

[@carultch]

I see two possible interpretations of this problem 1. The mass is guided by a human force, from the unstressed position of the spring (yi) until it comes to rest at the given position (yf) where the spring force and force of gravity are in equilibrium. 2. The mass falls from yi to yf with no forces other than gravity and the spring force. It starts at the unstressed position (yi) of the spring and then falls as far as it can before coming to rest momentarily at the given position (yf). If allowed to continue, the mass would oscillate up and down, with turning points at yi and yf, and a new equilibrium position exactly half way between yi and yf. Your interpretation was interpretation #1. If you went by interpretation #2, the spring constant would be 467 N/m, and the work done by the spring would be -0.412J.

[@FlippingPhysics]

I thought I made it pretty clear from the demonstration that it was #1. Also, I said it “comes to rest” at the final position. Which implies that it remains there, however, I will admit that is not as clear as it could be.

[@carultch]

@@FlippingPhysics The demonstration was completely clear that it was #1. The written problem statement is what could use clarity, particularly if it were an exam question.

[@Nitstar6174]

Hey! I am a big fan of your videos and am watching your AP physics 1 videos at this time. However, I am a bit confused on what type of videos you are making these days. Are you doing preparation for AP mechanics C, AP-2, or just some fun problems? :)

[@FlippingPhysics]

Currently I am working my way through the AP Physics C: Mechanics curriculum.

[@Nitstar6174]

@@FlippingPhysics Oh that's nice! Thanks for the quick reply. Just to be curious, when do you expect to finish it?

[@FlippingPhysics]

I have it scheduled out such that I should be done with the AP Physics C: Mechanics curriculum by April of 2022.

[@Nitstar6174]

@@FlippingPhysics Oh, that is awesome! Looking forward to it!

[@djokoadiwinata8922]

Very nice 👍🏻👍🏻👍🏻

[@FlippingPhysics]

Thanks!

[@conyislandqueen1058]

Wow man

[@MrYahya0101]

Maybe it would've been more straightforward to just go in the direction of the displacement when calculating Work, to avoid getting negative work, especially when work is done on the system and not by the system?

[@wowgggearing]

make spring powered car with regenerative brake