Question

Why there is not work done when force is applied and displacement is at 90 degrees or right angle?​

Answer 1

Explanation:

Since cos 90 = 0, therefore work done is zero. In circular motion, angle between centripetal force (along radius)and linear displacement ( along tangent) is 90 degrees , work done is zero. ... Work is said to be done when force displaces an object in its own direction .