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​The brakes are applied to a moving car, causing it to uniformly slow down.



The brakes are applied to a moving car, causing it to uniformly slow down. While slowing, it moves a distance of 40.0 m in 7.65 s to a final velocity of 1.95 m/s, at which point the brakes are released 


(a) What was its initial speed (in m/s), just before the brakes were applied?

(b) 

What was its acceleration (in m / s²) while the brakes were applied? (Assume the initial direction of motion is the positive direction. Indicate the direction with the sign of your answer.)


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