If the equation for the displacement of a particle moving on a circular path is given by \(\theta = 2t^3 + 0.5\), where \(\theta\) is in radians and \(t\) in seconds, then the angular velocity of the particle after \(2s\) from its start is

  1. \(8 \, \text{rad/s}\)
  2. \(12 \, \text{rad/s}\)
  3. \(24 \, \text{rad/s}\)
  4. \(36 \, \text{rad/s}\)

Answer (Detailed Solution Below)

Option 3 : \(24 \, \text{rad/s}\)

Detailed Solution

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Angular displacement of the particle: \(\theta(t) = 2t^3 + 0.5\) radians.

Therefore, angular velocity: \(\omega = \dfrac{d[\theta(t)]}{dt}\)

=\(6t^2 \, \text{rad/s}\)

Angular velocity at \(t = 2 \, \text{s}\): \(\omega|_{t=2} = 6 \times 2^2 = 24 \, \text{rad/s}\)

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