Question: A 7 . 0 kg shell at rest explodes into two fragments, one with a mass of 2 . 0 kg and the other with

A 7.0 kg shell at rest explodes into two fragments, one with a mass of 2.0 kg and the other with a mass of 5.0 kg . If the heavier fragment gains 100 J of kinetic energy from the explosion, how much kinetic energy does the lighter one gain?
A.150 J .
B.100 J .
C.50 J .
D.250 J .
A 7 . 0 kg shell at rest explodes into two

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