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A boy standing on a stationary lift (ope...

A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can equal to 49 ms-1. How much time does the ball take to return to his hands ? If the lift starts moving up with a uniform speed of 5 `ms^(-1)` and the boy again throws the ball up with the maximum speed he can, how long goes the ball take to return to his hands ?

Text Solution

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10s, 10 s
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Knowledge Check

  • In cricket match, a bowler throws a ball of 0.5 kg with a speed of 20 m/s. When a batsman swings the bat the ball strikes with the bat normal to it, and returns in opposite direction with speed of 30 m/s. If the time of contact of the ball with the bat is 0.1s, then the force acting on the bat is......N.

    A
    50
    B
    125
    C
    250
    D
    25

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