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24 January, 23:43

The acceleration of gravity on earth is approximately 10 m/s2 (more precisely, 9.8 m/s2. if you drop a rock from a tall building, about how fast will it be falling after 3 seconds?

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  1. 25 January, 00:36
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    From the equation;

    a = - 1:2gT2

    a = - 5*3 (3)

    a = - 45m/s

    it will drop about - 45m/s2.
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