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MHT CET · Physics · Motion In Two Dimensions

A particle is performing uniform circular motion. If ' \(\theta^{\prime},{ }^{\prime} \omega^{\prime},{ }^{\prime} \propto^{\prime}\) and 'a' are its
angular displacement, angular velocity, angular acceleration and centripetal
acceleration respectively, then which of the following is 'WRONG'?
(' \(\mathrm{v}\) ' is its linear velocity )

  1. A \(\overrightarrow{\mathrm{v}} \perp \overrightarrow{\mathrm{a}}\)
  2. B \(\vec{\omega} \perp \overrightarrow{\mathrm{V}}\)
  3. C \(\vec{\omega} \perp \vec{\alpha}\)
  4. D \(\vec{\omega} \perp \overrightarrow{\mathrm{a}}\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\vec{\omega} \perp \vec{\alpha}\)

Step-by-step Solution

Detailed explanation

In uniform circular motion: \(\vec{\alpha} = \frac{d\vec{\omega}}{dt} = \vec{0}\) (since \(\vec{\omega}\) is constant)