Question Detail
Question
Which of the following examples represent simple harmonic motion?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Simple harmonic motion is oscillatory motion where the restoring force is proportional to displacement. The oscillating mercury column in a U-tube approximates SHM. The rotation of the earth and a fan are periodic but not SHM. General vibrations of a polyatomic molecule are complex, not simple.
Hint
SHM requires a restoring force proportional to displacement (F = -kx).