Question

The coefficient of kinetic friction when a body is moving from a height above the ground level to a smaller height is ____________ than coefficient of static friction.

(a) Smaller

(b) Larger

(c) Significantly larger

(d) Highly larger

I have been asked this question in class test.

This is a very interesting question from Potential Energy in division Principle of Virtual Work of Engineering Mechanics

Answer 1

The correct option is (a) Smaller

The best explanation: The coefficient of kinetic friction is smaller than coefficient of static friction. The main thing about the kinetic one is that it is applied by the surface when the body is in motion. The static one is applied to the body when the body is static and is about to move.