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A pickup truck with mass 18• 105 gm is traveling eastbound at 15 m/s, while a compact car (900 kg) is traveling westbound with-15 m/s

A pickup truck with mass 18• 105 gm is traveling eastbound at 15 m/s, while a compact car (900 kg) is traveling westbound with-15 m/s. The vehicles collide head-on, becoming entangled.

 a. Find the speed of the entangled vehicles after the collision. 

 b. Find the change in velocity of each vehicle.

 c. Find the change in kinetic energy

 d. If the mass of both the vehicles were doubled, calculate how would the final velocity and change in kinetic energy be affected? 

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