Q: The following diagram shows a pendulum at different positions. Which one of the following statement is true?
(a)The pendulum has minimum potential energy at positions P and T.
(b)The pendulum has minimum potential energy at positions Q and S.
(c)The pendulum has minimum potential energy at position R.
(d)The pendulum has same potential energy at all positions.
Correct Answer: (c)
Detailed explanation coming soon.