Question

A man moves from a point on the horizontal surface of earth (assumed smooth) and reaches diagonally opposite point of a room. What is the work done by him –

• A. Negative
• B. Positive
• C. Nothing can be said.
• D. Zero

Answer 1

The correct option is D Zero

As surface is smooth so work done against friction is zero. Also the displacement and force of gravity are perpendicular so work done against gravity is zero.