An unruly demonstrator lift a stone of mass `m` kg from the ground and throws it at this
Channel: Doubtnut
Date: 2020-08-30

An unruly demonstrator lift a stone of mass `m` kg from the ground and throws it at this opponent. At the time of projection, the stone is at height `h` meter above the ground and has a speed of `v(m)//(s)` what horse power does he use?