Question

A bus in motion increases its speed from 18kmph to 72kmph in 20 seconds find its acceleration.
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Answer 1

Initial speed = u = 18 km/hr = 5 m/s

Final sped = v = 36 km/hr = 10 m/s

acceleration a = (v-u)/t = (10-5)/5 = 1 m/s2

Distance travelled S = ut+ (1/2) a t2 = 5*5+ (1/2)x1x52 = 37.5 m

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