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Question: Answered & Verified by Expert
A particle has simple harmonic motion. The equation of its motion is $\mathrm{x}=5 \sin (4 t-\pi / 6)$, where $\mathrm{x}$ is its displacement. If the displacement of the particle is 3 units, then its velocity is
PhysicsOscillationsJEE Main
Options:
  • A $\frac{2 \pi}{3}$
  • B $\frac{5 \pi}{6}$
  • C 16 units
  • D 20 units
Solution:
2456 Upvotes Verified Answer
The correct answer is: 16 units
From the given equation,
The amplitude of the wave is $\mathrm{a}=5$ and the angular velocity of the wave is $\omega=4$
The velocity of the wave can be obtained as: $\therefore \mathrm{v}=\omega \sqrt{\mathrm{a}^2-\mathrm{y}^2}$ $=4 \sqrt{(5)^2-(3)^2}=16$ units

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