AP Physics C: Work, Energy, and Power Review (Mechanics)

Calculus based review of work done by constant and non-constant forces, Hooke’s Law, Work and Energy equations in isolated and non-isolated systems, kinetic energy, gravitational potential energy, elastic potential energy, conservative vs. nonconservative forces, conservation of mechanical energy, power, neutral, stable, and unstable equilibrium.
For the calculus based AP Physics C mechanics exam.

0:00 Intro
0:11 Work done by a constant force
2:25 Work done by a non-constant force
3:58 Force of a Spring (Hooke’s Law)
4:52 Calculating the work done by the force of a spring
6:26 Net work equals change in kinetic energy
7:02 Gravitational Potential Energy
7:50 Non-isolated systems work and energy
8:29 Isolated systems work and energy
9:02 Conservative vs. Nonconservative forces
10:10 Conservation of Mechanical Energy
10:45 Power
12:09 Every derivative can be an integral
13:00 Conservative forces and potential energy
13:46 Deriving Hooke’s Law from elastic potential energy
14:22 Deriving the force of gravity from gravitational potential energy
15:17 Neutral, stable, and unstable equilibrium

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[minecraftlover]

You taught me more than my physics teacher.

[Folinic]

I am in college and these videos help greatly with calculus-based physics. Thanks a lot!

[Vearali]

Woke up at 3:45 AM to study for my physics quiz today, and felt like I needed a good review of things before. Thanks a lo for this really helpful video!

[jayy]

I appreciate you and your hard work. Realize that my AP Physics C test is in ~24 hrs and and because of you, I just might pass. Super clear, understood everything.

[jodhpullela]

I've got my apc mechanics final tomorrow and this is really helping me out, thanks!

[clementhilty]

In the first 108 seconds of this video, I learned more than hours and days of physics classes taught in a month. I'm never going back to "49 degrees south of east"!

[ShoaibRashdi]

I love the fact that you are so precise. I've got books where the displacement is simply denoted by "d", and that annoys the hell out of me.

[grantwilkins]

Will there be a series of videos like this for APPC: E&M in the future? Thank you for all you do!

[gauravkhot]

I did some research and U is purely a technical varibale, not a symbol like F for force. It was chosen because all the other letters were taken up in Thermo!

[Maxunjump]

The U in potential energy actually comes from the graph of potential energy, which decreases as it converts to kinetic energy when losing height and regaining as that kinetic energy is converted back to potential energy 👍

[camilamendes]

Can you tell me about your technique of learning ? U have got such an amazing personality with good humor ! Very less people possess them ! We will always be supporting you ! I told all of my classmates and my relatives about your videos ! I m totally renowned in the class because of your videos ! Everyone's saying "its great " ! Keep uploading videos ! Can you do some more videos relating to nunerical of kinematics

[jeffchadwick]

I have a question: Thinking about a vehicle accelerating from 0 to 60 and then slowing from 60 to 0. Is the energy to accelerate the vehicle from 0 to 60 the same as the energy to slow the vehicle from 60 to 0? ... I contend that more energy is required to accelerate to 60 than is required to slow the vehicle to 0. The reason for my conclusion is that wheel and bearing friction must be overcome to accelerate the vehicle, while the same friction assists with slowing the vehicle. Therefore the energy required to slow down the vehicle is less than the energy necessary to accelerate the vehicle. ... What do you think?

[LW-wezn]

13:47 I take this class during my exchange year (i’m a junior) ... i also have AP calculus BC and AP Biology ... but physics is definitely the most fun but hardest class I have the biggest problem is the language in the FRQ part

[Mainline]

Question: what's different about the marker and the bottle that makes ones center of mass go down and ones center of mass go up, as you said in the video? Thanks for the videos

[mrwilliamsphysics]

I really enjoyed this video. As I teach physics it is great to see good explanations of topics. Here is a link to my notes on Energy:

As well as a link to some practice MCQ AP Questions:

It is always great for students to see concepts from multiple viewpoints.

[Lianasufi]

Sir when energy is nonconservative than force constant or not if it is non constant force then y in spring we use non constant force formula as we know spring force comes under conservative force. Or energy

[Frogbjb]

Why is the symbol for gravitational potential energy a capital U?

[danielkwon]

For Ue=1/2kx^2, can this be only used when the situation is elastic?
Also, if so, what does it mean by Elastic Potential Energy?
Thank you!

Comment: Your explanation....if someone does not understand, that is weird

Thank you!

[physicsmadeeasy]

we take these concepts and more in grade 11 physics course in united arab emirates

[zunif]

If i were riding in car 80mph and threw a pencil up in the air inside the car, shouldn't the pencil fly back immediately just as if i were to do it outside the car?