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27 October, 16:57

If we know the total energy in a system is 30 j, and we know the PE is 20 j, what is the KE?

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  1. 27 October, 17:43
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    30j-20j = 10j

    The kinetic energy is 10 joules

    The total energy is equivalent to PE+KE. Therefore the answer is 10 joules.
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