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29 October, 03:17

The total energy in a system is 30J and the PE is 20J. what is the KE?

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  1. 29 October, 03:35
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    Total mechanical energy = potential energy + kinetic energy.

    If we plug in our numbers:

    30 = 20 + KE

    Let's solve for KE:

    30-20 = KE

    10 = KE

    If we go back to the original equation:

    30 = 20 + 10

    Thus we know this is correct.
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