Question Detail

PHY 104 PHY 104 Past Questions Objective Question

Question

Which of the following examples represent simple harmonic motion?
Options
A The rotation of the earth about its axis.
B The motion of an oscillating mercury column in a U-tube.
Correct Answer
C General vibrations of a polyatomic molecule about its equilibrium position.
D A fan rotating with a constant angular velocity.
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).

Question Info