Question

Assertion (A): The total mechanical energy of a freely falling object remains constant. Reason (R): The potential energy decreases while kinetic energy increases, keeping the total energy constant.

A cube of mass M starts at rest from point 1 at a height 4R, where R is the radius of the circular track. The cube slides down the frictionless track and around the loop. Find the force which the track exerts on the cube at point 2.