Question

A man climbs a slope and another walks a same distance on a horizontal level road. Who does more work? Give a reason for your answer.

Answer 1

The man climbing the slope does more work against gravity because he gains height. The work done against gravity is mgh, where h is the vertical height gained. On a horizontal road, there is no change in height, and the displacement is perpendicular to the gravitational force; hence, no work is done against gravity.