A 720- k g car stopped at an intersection is rear-ended by a 1710- k g truck mov

Question

A 720-kg car stopped at an intersection is rear-ended by a 1710-kg truck moving with a speed of 16.0m/s . Part A If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of the truck. ANSWER:    vtruck =   m/s   Part B Find the final speed of the car. ANSWER:   vcar =   m/s   A 720-kg car stopped at an intersection is rear-ended by a 1710-kg truck moving with a speed of 16.0m/s . Part A If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of the truck. ANSWER:    vtruck =   m/s   Part B Find the final speed of the car. ANSWER:   vcar =   m/s   A 720-kg car stopped at an intersection is rear-ended by a 1710-kg truck moving with a speed of 16.0m/s . Part A If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of the truck. ANSWER:    vtruck =   m/s   Part B Find the final speed of the car. ANSWER:   vcar =   m/s   A 720-kg car stopped at an intersection is rear-ended by a 1710-kg truck moving with a speed of 16.0m/s . Part A If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of the truck. ANSWER:    vtruck =   m/s   Part B Find the final speed of the car. ANSWER:   vcar =   m/s   A 720-kg car stopped at an intersection is rear-ended by a 1710-kg truck moving with a speed of 16.0m/s . Part A If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of the truck. ANSWER:    vtruck =   m/s   Part B Find the final speed of the car. ANSWER:   vcar =   m/s   A 720-kg car stopped at an intersection is rear-ended by a 1710-kg truck moving with a speed of 16.0m/s . A 720-kg car stopped at an intersection is rear-ended by a 1710-kg truck moving with a speed of 16.0m/s . A 720-kg car stopped at an intersection is rear-ended by a 1710-kg truck moving with a speed of 16.0m/s . Part A If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of the truck. ANSWER:    vtruck =   m/s   Part B Find the final speed of the car. ANSWER:   vcar =   m/s   Part A If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of the truck. ANSWER:    vtruck =   m/s   Part A If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of the truck. ANSWER:    vtruck =   m/s   ANSWER:    vtruck =   m/s      vtruck =   m/s   Part B Find the final speed of the car. ANSWER:   vcar =   m/s   Part B Find the final speed of the car. ANSWER:   vcar =   m/s   ANSWER:   vcar =   m/s     vcar =   m/s      vtruck =   m/s  

Explanation / Answer

From the law of conservation of momentum for an elastic collision:

m?v?(i) + m?v?(i) = m?v?(f) + m?v?(f)

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