If the amplitude of oscillation of a simple pendulum is very small, th

If the amplitude of oscillation of a simple pendulum is very small, then its time period of oscillation

  • 1. depends on the length of the pendulum, L
  • 2. depends on the acceleration due to gravity, g
  • 3. depends upon the mass of the bob of the pendulum, m
  • 4. does not depend upon the amplitude of the pendulum, A

Select the correct answer using the code given below.

1, 2 and 3
1, 2 and 4
2, 3 and 4
1 and 4 only
This question was previously asked in
UPSC CAPF – 2018
The time period of oscillation of a simple pendulum, when the amplitude is very small, depends on the length of the pendulum and the acceleration due to gravity, but not on the mass of the bob or the amplitude.
For small oscillations (amplitude A is very small), the formula for the time period (T) of a simple pendulum is given by T = 2π√(L/g), where L is the length of the pendulum and g is the acceleration due to gravity. This formula explicitly shows that the time period depends on L and g, but it does not contain the mass (m) of the bob or the amplitude (A). The condition of small amplitude is crucial for this simplified formula to hold, implying independence from amplitude in this specific case.
For larger amplitudes, the time period of a simple pendulum is slightly longer and does depend on the amplitude. However, the question specifically states “amplitude… is very small”, which validates the use of the small-angle approximation formula.