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17 April, 17:39

A mover pushes a 245 kg piano so that it accelerates uniformly from rest to 1.5 m/s in 5.00 s. What is the power delivered by the mover in this time interval? A 55W B 110W C 280W D 540 W

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  1. 17 April, 18:05
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    B, 110 W

    Explanation:

    we can use the equation P = Fv

    P = Fv

    P = mav

    m = 245 kg

    a = (vf - vo) / t

    a = (1.5 - 0) / 5

    a = 0.3 m/s^2

    v = 1.5 m/s

    P = 245 * 0.3 * 1.5

    P = 110 W

    answer choice B
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