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31-07-2018
Physics

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A 12 kg ball moving at 20 m/s strikes another ball at rest. After a completely inelastic collision, the balls move at 10 m/s. What was the mass of the second ball?

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erishafrizpcqy42 erishafrizpcqy42

01-08-2018

(12)(20)+(x)(0)=(12+x)(10)
240=120+10x
120=10x
x=12 kg

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