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6 January, 23:25

To what height would a 2-kg object have to be raised so that its gravitational potential energy would equal the kinetic energy it would possess if it were moving at 3 m/s

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  1. 7 January, 01:26
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    Kinetic energy = 0.5mv^2

    For the object moving at 3m/s, it has kinetic energy = 0.5*2*3^2 = 9J

    Gravitational potential energy = mgh

    Assuming g = 9.81 m/s^2, solving for 9J = mgh gives h = 9 / (2*9.81) = 0.459m (3 s. f.)
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