During a training session, two footballers pass a ball repeatedly between each other. The 'to and fro' motion of the ball is not simple harmonic because the I. Acceleration of the ball is not directed towards a fixed point II. Restoring force is not directed towards the centre III. Acceleration of the ball is not directly proportional to the displacement from a fixed point Which of the statements above are correct?
A. I and III only B. I and II only C. II and III only D. I, II and III
Correct Answer: A
Explanation
In SHM, the body must have acceleration in a direction opposite to the displacement and the acceleration must be directly proportional to displacement. Also, the acceleration must be directed towards its mean position. This is not the case with a football on the pitch.
