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20 March, 02:22

a 0.0780 kg lemming runs off a 5.36 m high cliff at 4.84 m/s. what is its potential energy (PE) when it is 2.00 m above the ground

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  1. 20 March, 03:16
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    1.56 J

    Explanation:

    The potential energy only depends on the vertical height from the ground level.

    We consider the ground level to have zero P. E.

    So when it is 2 m above the ground level,

    P. E. = mgh

    = 0.078*10*2

    = 1.56 J
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