CBSE Class 11-science Answered
if a man of mass m jumps to the ground from height h and his centre of mass moves a distance d in the time taken by him to hit the ground show that the average force acting on him is mgh/d
Asked by Akshansh prasad | 04 Apr, 2013, 05:00: PM
Expert Answer
Force is considered the change in potential energy, U, over a change in position, x. In other words it is the derivative of potential energy with respect to time.
F = dU/dx
F = dU/dx
here,U=mgh
change in position=change in position of centre of mass=d
so average force=mgh/d
Answered by | 05 Apr, 2013, 11:51: AM
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