A car travels with a uniform velocity of 55m/s for 10s. The brakes are then applied and the car is uniform retarted and comes to rest in further 20s.
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velocity= 55m/s
time= 10s
we know, velocity=distance/time
hence, distance= 55×10= 550m
Also the retardation is same as deceleration,
a=velocity/time=55/20= 2.75m/ssq.
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