An initially motionless test car is accelerated uniformly to 145 km/h in 8.28 se

Question

An initially motionless test car is accelerated uniformly to 145 km/h in 8.28 seconds before striking a simulated deer. The car is in contact with the faux fawn for 0.455 seconds, after which the car is measured to be traveling at 60.0 km/h. What is the magnitude of the acceleration of the car before the collision? What is the magnitude of the average acceleration of the car during the collision? What is the magnitude of the average acceleration of the car during the entire test, from when the car first begins moving until the collision is over?

Explanation / Answer

a) a=(145-0)*60*60/8.28=63043km/hr^2 b) a avg= 60-145/0.455=-672527km/hr^2 c) a avg= (60-0)/(8.28+0.455)=24728km/hr^2

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