A man whose mass is m kg jumps vertically into air from a sitting position in which his centre of
Channel: Doubtnut
Date: 28/01/2020

A man whose mass is m kg jumps vertically into air from a sitting position in which his centre of mass is at a height `h_(1)` from the ground. When his feet are just about to leave the ground his centre of mass is `h_(2)` from the ground and finally rises to `h_(3)` when he is at top of the jump . What is the average upwards force exerted by the ground on him ?