Question

A boy drops a stone from the top of building 100m high. Another boy throws am iron ball with certain velocity just after 2 seconds of stone dropped.
Calculate:-

(1) velocity with which the iron ball was thrown so that both the stone and iron ball strikes the ground at same time?

(2) velocity of stone and iron ball with which they got the ground?

Answer 1

Answer:

1). ( 9-√5)/2. m/s square

2). stone v. 20√5 m/s square

ironball v. ( 39√5-31)/2 m/s square