the potential energy of a body which mass is "m"(adsbygoogle = window.adsbygoogle || []).push({});

and which is moving in one demention is given by:

U(x)=U0 * (a/x + x/a -2)

what is the power which being put on the body

the solution says F=-dU/dx=U0(-1/a + a/x^2)

which means that they are doing a derivative to the original expression.

but i cant understand why the derivative of potential energy is its power.

from high school i know the potential energy is U=m*g*h

and the only derivative that i know is for a(t)=v'(t) v(t)=x'(t)

so their solution is not logic to me at all

???

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# Homework Help: Potential energy question

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