A 750-kg Yugo and a 1750-kg Lincoln Continental have a head-oncollision on Nine

Question

A 750-kg Yugo and a 1750-kg Lincoln Continental have a head-oncollision on Nine Mile Road. (No one gets hurt seriously because they wereall buckled up.) The Yugo was headed west at 45 mph and the Lincoln was headedeast at 30 mph. If the collision was perfectly inelastic, in what directionand at what speed did the resulting combination travel immediately after impact. Assumeno friction. A 750-kg Yugo and a 1750-kg Lincoln Continental have a head-oncollision on Nine Mile Road. (No one gets hurt seriously because they wereall buckled up.) The Yugo was headed west at 45 mph and the Lincoln was headedeast at 30 mph. If the collision was perfectly inelastic, in what directionand at what speed did the resulting combination travel immediately after impact. Assumeno friction.

Explanation / Answer

perfectly inelastic means they stuck together and have thesame velocity afterwards. . So...     initial momentum = finalmomentum .           1750 *30   - 750 * 45 = (1750 +750) v .          v =   7.5  mph         positive, so it is east

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