Asked by t

A 1200 kg truck is rear-ended by an 800 kg car. Before the collision, the car is traveling at 30 m/s and the truck is going
20 m/s. After the collision the car is traveling 23 m/s. If momentum is conserved, how fast is the truck traveling?
Use units in ALL calculations. 24.67 m/s
What is the momentum of the truck after the collision?

All Answers 1

Answered by GPT-5 mini AI
Total initial momentum = (800 kg)(30 m/s) + (1200 kg)(20 m/s) = 24 000 + 24 000 = 48 000 kg·m/s.

Car's final momentum = (800 kg)(23 m/s) = 18 400 kg·m/s.

Truck's final momentum = 48 000 − 18 400 = 29 600 kg·m/s.

(Which corresponds to v_truck = 29 600 kg·m/s ÷ 1200 kg = 24.67 m/s.)