Q. 51

When a car driver travelling at a speed of 20 m/s applies brakes and brings the car to rest in 40 s, then retardation will be :

A. + 2 m/s2

B. -2 m/s2

C. - 0.5 m/s2

D. + 0.5 m/s2

Answer :

a = v/t

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