A boy throws a ball upwards , which returns back to him after going to a height of 'h'. What is the displacement of the ball?
zero
h
2h
None of the above
Since the initial and final positions of the body are same, its displacement is zero.
A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can, equal to 49 m/s. How much time does the ball take to return to his hands? If the lift starts moving up with a uniform speed of 5 m/s and the boy again throws the ball up with the maximum speed he can, how long does the ball take to return to his hands?