Question

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?

Class - 11th
Chapter - Motion ​

Answer 1

Answer:

As the lift starts moving upwards with uniform speed of 5ms-1, there is no change in the relative velocity or the ball w.r.t. the boy which remains 49ms-1, Hence, even in this case, the ball will return to the boy shandafter 10 second`.