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16 June, 18:11

A ball is thrown straight up into the air with a speed of 10 m/s. If the ball has a mass of 0.3 kg how high does the ball go?

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  1. 16 June, 19:45
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    Answer;

    = 5.102 m

    Explanation;

    The total energy, i. e. sum of kinetic and potential energy, is constant.

    That is; E = KE + PE

    Initially, PE = 0 and KE = 1/2 mv^2

    At maximum height, velocity=0, thus, KE = 0 and PE = mgh

    Since, total energy is constant (KE converts to PE when the ball is rising).

    Therefore, KE = PE

    or, 1/2 mv^2 = mgh

    or, h = v^2 / 2g

    = 10^2 / (2x9.8)

    = 5.102 m
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