Question

Examples in which force acts perpendicular to the direction of motion and no work is done

Answer 1

Electron moving around a proton in circular motion inside an atom.

Answer 2

The force exerted by the person is an upward force equal to the weight of the box, and that force is perpendicular to the motion. ... For circular motion, the centripetal force always acts at right angles to the motion. It changes the direction of the motion, but it does no work on the object.