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18 October, 09:25

If a boy (m = 50kg) at rest on skates is pushed by another boy who exerts a force of 200 N on him and if the first boy's final velocity is 8 m/s, what was the contact time?

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  1. 18 October, 09:51
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    F * t = (m x v_final) - (m x v_initial)

    200 x t = 50x8 - 50x0

    t = 50 x 8 / 200

    t = 2s
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