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    why is it impossible for a centripetal force to do work?

    thanks
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    Work done is force x distance along the direction of the motion. But the motion is always perpendicular to the force, so there is no component of the force acting in the direction of the motion.
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    (Original post by endeavour)
    Work done is force x distance along the direction of the motion. But the motion is always perpendicular to the force, so there is no component of the force acting in the direction of the motion.
    hence the work done is 0.
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    force x distance in direction of force
    direction of motion=circumference of circle eg around
    direction of force = inward toward centre.

    no movement in this direction. hence no work done be force
 
 
 

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