Question:

If $x, v$ and $a$ denote the displacement, the velocity and the acceleration of a particle executing simple harmonic motion of time period $T$, then, which of the following does not change with time?

Updated On: Jul 28, 2022
  • $a^2 T^2 +4 \pi^2 v^2$
  • $\frac{a T}{x}$
  • $aT + 2 \pi v$
  • $\frac{a T}{v}$
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The Correct Option is B

Solution and Explanation

For a particle executing simple harmonic motion, acceleration, $a = - \omega^2 x$ where $\omega = \frac{2 \pi}{T}$ $ a = - \frac{4 \pi^2}{T^2} x $ or $\frac{aT}{x} = - \frac{4 \pi^2}{T}$ The period of oscillation T is a constant. $ \therefore \:\: \frac{aT}{x} $ is a constant.
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Concepts Used:

Acceleration

In the real world, everything is always in motion. Objects move at a variable or a constant speed. When someone steps on the accelerator or applies brakes on a car, the speed of the car increases or decreases and the direction of the car changes. In physics, these changes in velocity or directional magnitude of a moving object are represented by acceleration

acceleration