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Question: Answered & Verified by Expert
A particle is executing uniform circular motion with velocity $\vec{v}$ and acceleration $\vec{a}$. Which of the following is true?
PhysicsMotion In Two DimensionsNEETNEET 2023 (Manipur)
Options:
  • A $\vec{v}$ is a constant; $\vec{a}$ is a constant
  • B $\vec{v}$ is not a constant; $\vec{a}$ is a constant
  • C $\vec{v}$ is a constant; $\vec{a}$ is not a constant
  • D $\vec{v}$ is not a constant; $\vec{a}$ is not a constant
Solution:
2258 Upvotes Verified Answer
The correct answer is: $\vec{v}$ is not a constant; $\vec{a}$ is not a constant
$\vec{v}$ is not a constant; $\vec{a}$ is not a constant
In uniform circular motion $\vec{v}$ keeps changing at every instant while magnitude of a remains same but its direction keeps changing.
Thus $\vec{a}$ is also not constant.

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