Question
Tue November 22, 2011 By: Kunwar Aditya

A force (mv*v/r) is acting on a body of mass m moving with a speed v in a circle of radius r. what is the work done by the force in moving the body over half the circumference of the circle?explain your answer.

Expert Reply
Tue November 22, 2011
work done by the centripetal force on an object moving in a circular path is always 0.
we know work  W=F .s=F s cos ?
if ?is 90°then force is 0.as in circular motion the angle between centripetal force(acing towards centre) and displacement(along tangent) is 90°,work done is 0
Home Work Help