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14 January, 13:39

A boy drops a stone from a cliff, which reaches the ground in 20 seconds. Calculate the height of the cliff.

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  1. 14 January, 15:30
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    More suvat equations here, this time s=ut+1/2at^2 where s is the displacement, t is the time, and a is the acceleration.

    So s=0*20+1/2*9.81*20^2

    simplified: s=1/2*9.81 * (20) ^2

    s=1962

    The height of the cliff is 1962m
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