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A Mysterious Force

An object of ...

Question

An object of mass m moves in a circular path of radius R under the action of a force of constant magnitude F. The kinetic energy of object is?

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Solution

Force F is providing the centripetal force keeping the object moving in a circular path.

F = mv²/R

rearrange:

FR = mv²

kinetic energy = ½mv² = ½FR

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