Question

When a body moves with constant speed in a circular path, then:

• A. work done will be zero
• B. acceleration will be zero
• C. no force acts on a body
• D. its velocity remains constant

Answer 1

The correct option is A work done will be zero

if the speed is constant then change is kinetic energy is zero corresponding work done will be zero. the forces applying on the body are in radial direction and movement of body is tangential (angle between force and displacement is ${90}^{\circ }$) sot the total work done by forces will be zero.