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
Verified Correct Answer: D.
Physical Principles & Numerical Solution
In SHM, the body must have acceleration in a direction opposite to the displacement, and the acceleration must be directly proportional to the displacement. Also, the acceleration must be directed towards its mean position. This is not the case with a football on the pitch. Also, in SHM, the restoring force must act towards the equilibrium point.
Source: Myschool Past Questions Archive (Record #49646)