a) Two vehicles travelling on a road in the same direction collide. Vehicle 1 ha

Question

a) Two vehicles travelling on a road in the same direction collide. Vehicle 1 has a mass 1200kg and is travelling at 30m/s. Vehicle 2 has a mass 900kg and is travelling at 45m/s. Assuming that the cars momentarily lock together and continue moving in the same direction determine the new velocity(combined) of the cars after the collision. b) Determine the change in momentum in each vehicle. c) If the time of deceleration of vehicle 2 during the collision is 0.15 seconds determine the average force acting on the vehicle during this time. d) Determine the average force acting on vehicle 1 during the 0.15 seconds.

Explanation / Answer

a) 1200*30 + 900*45 = 2100*V v= 36.428 (approx) (momentum conservation) b) change in momentu = M(V2-V1) 1. 1200 (36.428-30) = 7713.6 2. 900(45-36.428) = 7714.8 aprrox(both should be same ) c) force = change in momentum / time = 7714 / 0.15 = 51426.66 d) same amount of force will be working on vehicle 1

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