Homework Answers
m1 + m2 = 10
By the conervation of momentum we have
mV = m1u1 + m2u2
10*0 = m1*5 + (10-m1)*(-2)
m1 = 20/7 = 2.857 = 2.9 kg
so option c) 2.9 kg is the correct answer
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