Question

A ball is rolling from A to D on a flat and smooth surface. Its speed is 2 cm/s. On reaching B, it was pushed continuously up to C. On reaching D from C, its speed had become 4 cm/s. It took 2 seconds for it to go from B to C. What is the acceleration of the ball as it goes from B to C.

Answer 1

As its initial and final positions are one and the same.

Initial Velocity = 2 cm/s.

Final Velocity = 4 cm/s.

Time taken for the change in velocity from B to D = 4 cm/s – 2 cm/s = 2 cm/s