# physics

A person hammered a 0.5 kg something (substance ) with a hammer that its weight is 2.5 kg , with the velocity 65 m /s ,, if one third of the hammer's energy turn into the internal energy to both of the substance and the hammer , then what is the change (increasing ) internal energy ?

Thank you a lot

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1. 1/2 *2.5*65^2 * 1/3 =internal energy

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bobpursley

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