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A boy standing at the top of a tower of ...

A boy standing at the top of a tower of 20m of height drops a stone. Assuming `g=10ms^(-2)`, the velocity with which it hits the ground is :-

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The correct Answer is:
D
Positive slopes have positive acceleration, negative slopes have negative acceleration.
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Knowledge Check

  • A stone is dropped from the top of tower. If its velocity at the mid point of height of tower is 10ms^(-1), then the height of a tower is ..... (g = 10 ms^(-2))

    A
    10
    B
    16
    C
    8
    D
    20

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