a car moves with a uniform velocity of 72km /h for 15 s on a national highway over a straight stretch of road . (a)what is its acceleration? (b) calculate the distance travelled.
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Answer. (a) Since the car is moving with uniform velocity so the acceleration is zero. (b) Now, distance travelled = speed × time taken. Speed = 72 km/hr and time = 15 sec = 0.0041 hr (approx).
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