Why is the foot of a man injured when he hits a stone?
When a person hits a heap of straw, his foot is not injured. Why?
when a player gets injured, why ethyl chloride is sprayed on the injured portion?
Why does a glass window pane cracks when hit by a stone?
From a cliff of 49m high, a man drops a stone. One second later, he throws another stone. They both hit the ground at the same time. Find out the speed with which he threw the second stone.