SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A 3, 000 kg truck moving at 10 m/s to the right hits a 1, 000 kg parked car (zero initial speed). The parked car moves off at 15 m/s, to the right. What is the velocity of the truck?
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15 m/s, to the right
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5 m/s, to the left
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5 m/s, to the right
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15 m/s, to the left
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Explanation:
Detailed explanation-1: -Pcarmcarv=(1, 000kg)(20m/s)=20, 000kg⋅m/s. Ptruck=mtruckv=(5, 000kg)(20m/s)=100, 000kg⋅m/s. Although the car and truck have the same speed, the truck has more momentum because it has more mass.
Detailed explanation-2: -Therefore, the momentum of the car is 15000 kg m/s.
There is 1 question to complete.