Physics

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The brakes on a parked car fall and it accelerates at a constant rate, rolling into a lamp post down the hill. the car reaches a velocity of 4.3m/s by the time it smashes into the lamp post. The time between the brakes failing and the smashing of the car is 3.7s.
A. what is the cars acceleration?
b. What was the average velocity of the car while it was rolling?
C. how far did the car roll before the collision?

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