A simple pendulum suspended from the ceiling of a train has a period 'T' when the train is at rest. When the train is accelerating with a uniform acceleration, the time period of simple pendulum will:
Correct answer: A. Decrease
- A. Decrease
- B. Increase
- C. Remains unchanged
- D. Becomes infinite
Explanation
When the train accelerates horizontally, the pendulum experiences a net effective gravitational force given by geff= √(g² + a²), which is greater than the gravitational acceleration g. The time period of the pendulum, expressed as T = 2π√(L/geff), therefore results in a shorter period since geff > g and leads to faster oscillations.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Simple Harmonic Motion
Simple harmonic motion is oscillation in which acceleration is directly proportional to displacement and directed toward the equilibrium position. Work includes displacement, velocity, acceleration, phase, period, frequency, amplitude and energy, with applications to springs and simple pendulums. The restoring force and the conditions for SHM distinguish it from general periodic motion.
Practise Waves
1,281 free Waves MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Simple Harmonic Motion questions
In which of the following scenarios will the K.E be zero?
If mass attached to a spring and the spring constant of a spring are doubled, the resulting Time period will:
In S.H.M which of the following remains constant?
The equation of SHM for a particle is (a + 4π2x = 0) where 'a' is instantaneous linear acceleration at displacement x. The frequency of motion is:
When the displacement is half the amplitude the ratio of potential energy to the total energy is
While noting the time period of a simple pendulum, the amplitude of vibration should be kept: