Question

1. A 30g marble rolls with a velocity of 2 m/s toward a 70 g marble at rest. The lighter marble(m1) stops moving as it hits the heavier marble(m2). This collision causes the heavier marble to move. What is the velocity of the heavier marble?

Answer 1

$m_1v_1=m_2v_2\to v_2=m_1v_1/m_2=0.03\cdot2/0.07=0.86\ (m/s).$ Answer