An initially motionless test car is accelerated uniformly to 120 km/h in 8.28 s before striking a simulated deer. The car is in contact with the faux fawn for 0.815 s, after which the car is measured to be traveling at 71.0 km/h. What is the magnitude of the acceleration of the car before the collision

The value is  

Explanation:

From the question we are told that  

  The velocity  is  " alt="\frac{120 * 1000}{3600} = 33.3 \ m/s" />" />

  The time taken is

    The  time taken for contact is  

     The  velocity of the of the car after contact is " alt="\frac{71 *1000}{3600} = 19.7 2 \ m/s" />" />

From the equation of kinematics we have that  

Here   u =  0 \ m/s  since the car is initially motionless

=>    

=>    

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