Question

Gopal dropped an apple from the top of his at at a height of 10m. He told his sister Seetha on the ground below that it will reach the ground in 2 seconds after he drops it. 

1. Can she catch it after 2 seconds? 

2. Derive suitable relation for time of fall. 

3. Draw the velocity-time graph of the above body (assume the body rebounds from the floor)

Answer 1

1. No.

2. S = ut + 1/2at² 

h = 0 + 1/2gt² 

If ball is dropped from a height ‘h’, we can write.

3.