Question

A rigid body of mass m is moving in a circle of
radius r with a constant speed v. The force on
my2
the body is *** and is directed towards the
centre. What is the work done by this force in
moving the body over half the cirumference of
the circle.​

Answer 1

Explanation:

The only force directed towards centre is nothing but Centripetal force which is produced due to Tension and work done by this force is always zero as it is Perpendicular to the path followed by the body

W= F.S

F.S = 0, means F is perpendicular to S(displacement vector)

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