Explanation:

Starting from a stationary position, Rahul paddles his bicycle to attain a velocity of 6m s-1 in 30s. Then he applies brakes such that the velocity of the bicycle comes down to 4 m s-1 in the next 5s. Calculate the acceleration of the bicycle in both the cases.

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Answer:

Starting from a stationary position, Rahul paddles his bicycle to attain a velocity of 6 ms−1 in 30sec. ... ⇒a=630=0.2ms−2. So in the first case his acceleration is 0.2ms−2 . Now in the second case he applies brakes such that the velocity of the bicycle comes down to 4m/s in the next 5s.