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Two rail trucks of masses 6000 kg and 2000 kg collide head-on at equal speeds v. Immediately after the collision, the 6000 kg truck stops relative to the ground and the 2000 kg truck moves off with a speed of 6.0 ms−1. a. Determine the initial speed v of the trucks. b. Show that the collision is elastic.

Two rail trucks of masses 6000 kg and 2000 kg collide head-on at equal speeds v. Immediately after the collision, the 6000 kg truck stops relative to the ground and the 2000 kg truck moves off with a speed of 6.0 ms−1. a. Determine the initial speed v of the trucks. b. Show that the collision is elastic.

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  1. Two rail trucks of masses 6000 k g and 2000 k g collide head-on at equal speeds v . Immediately after the collision, the 6000 k g truck stops relative to the ground and the 2000 k g truck moves off with a speed of 6.0 m s − 1 . a. Determine the initial speed v of the trucks. b. Show that the collision is elastic.

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