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Resistka's avatar

What is the Formula for Kinetic Energy, And Potential Energy?

Asked by Resistka (160points) November 16th, 2009

I know it is something like Ke=½ · M² or something like that, could you please tell me the exact formula, and the potential one as well, (Gravity).

Please if you could provide a Example

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6 Answers

shrubbery's avatar

Ke = ½mv²
Kp = mgh

And Ep at top = Ek at bottom.
So if you throw a ball up from the ground when it gets to the top of the arc it stops for a split second and all the energy is gravitational potential, then it starts moving again and the Ep becomes less, the Ek becomes greater til at the bottom all the energy is kinetic energy and there is no gravitation potential energy.

shrubbery (10326points)“Great Answer” (1points) Flag as…
bhec10's avatar

Correction: Ke = ½ · m · v ²

bhec10 (6458points)“Great Answer” (1points) Flag as…
bhec10's avatar

damn @shrubbery you were faster!

bhec10 (6458points)“Great Answer” (1points) Flag as…
shrubbery's avatar

@bvdshec17 I’m just studying for a physics exam right now so I have it in front of me :)

shrubbery (10326points)“Great Answer” (1points) Flag as…
Ivan's avatar

Keep in mind that (½)mv^2 is only the translational kinetic energy. There are other forms of kinetic energy. Rotational, for example.

Ivan (13479points)“Great Answer” (0points) Flag as…

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