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Question
In a closed system, an object with a mass of 10 kg moves at a velocity of 5.4 m/s. It collides with a second object that has a mass of 12 kg and that is moving in the opposite direction with a velocity of 3.5 m/s. What is the total momentum of the system after the collision?(1 point)
Responses

54 kg-m/s
54 kg-m/s

12 kg-m/s
12 kg-m/s

42 kg-m/s
42 kg-m/s

66 kg-m/s
66 kg-m/s

Answer 1

Momentum is conserved, so total momentum = 10(5.4) + 12(−3.5) = 54 − 42 = 12 kg·m/s.