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A 1400 kg car at rest at a stop sign is rear ended by a 1860...

A 1400 kg car at rest at a stop sign is rear ended by a 1860 kg truck traveling at a speed of 20.9 m/s. After the collision, the two vehicles are locked together. Alice is moving past the collision site in a frame S' that is traveling at a constant velocity of 6.69 m/s in the direction of travel of the incident truck.

(a) Determine the momentum of the vehicles before the collision in Alice's frame.

(b) Determine the momentum of the vehicles after the collision in Alice's frame.

(c) Does Alice conclude that momentum is conserved during the collision?

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