Posted by: Nick G to Sciences » AP Physics » Videos » Energy, Work, and Power
This video covers the idea of potential energy and how it can change form into kinetic energy.
Score: 51Hubbell says: Really wish those answers had Joules on them. Now maybe I'll tackle that challenge problem at the end.
Nora says: Cool video. I dig the black and white (very classy), and the examples you gave were really helpful. I also like thinking about PEgrav as the amount of work it takes to move an object to a certain position above the earth (PEgrav=mgh=Fgrav(h), a force through a distance). This concept is especially relevant now given the parallels in electrostatics. When you're lifting a rock or something, you're moving it a certain distance through the gravitational field. When thinking about electric potential energy, you're instead moving a charged particle through an electric field, and the potential is given by Felec(d), or qEd. I was thinking about this because I watched this video the other day (https://www.khanacademy.org/test-prep/mcat/physical-processes/electrostatics-1/v/electric-potential-energy).
Hubbell says: Nora. Good call. Why don't you upload that video?