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An 1100-kg truck is stopped at a traffic light, when a 950-kg car going at 24.0...

An 1100-kg truck is stopped at a traffic light, when a 950-kg car going at 24.0 m/s rear-ends it. If the two vehicles stick together and move in the same direction the car had been going, find: (a) the speed of the combined wreck just aftedre the collision, (b) the amount of kinetic energy lost in the collision.

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