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A 1200 kg car is traveling initially with a speed of 25.0 m/sin an easterly direction crashes into the rear end of a 9000kg truck moving in the same direction at 20.0 m/s. The velocity of thecar right after the collision is 18.0 m/s to the east.

a) What is the velocity of the truck right after the collision?

b) How much mechanical energy is lost in the collision?Account for this loss in energy.

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