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

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 hoes the ball take to return to his hands ?

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10s, 10 s
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