NCERT Example 8.4 - Motion
Question: Starting from a stationary position, Rahul paddles his bicycle to attain a velocity of 6 m/s in 30 s. Then he applies brakes such that the velocity of the bicycle comes down to 4 m/s in the next 5 s. Calculate the acceleration of the bicycle in both cases.
Answer: The acceleration of the bicycle in the first case is **+0.2 m s⁻²** (speeding up) and in the second case is **−0.4 m s⁻²** (retardation).
Full step-by-step NCERT solution with diagrams on Something by Zero.