MHT CET · Physics · Rotational Motion
When a ceiling fan is switched off, its angular velocity falls to \(\left(\frac{1}{3}\right)^{\mathrm{rd}}\) while it makes 24 rotations. How many more rotations will it make before coming to rest?
- A \(3\)
- B \(6\)
- C \(9\)
- D \(12\)
Answer & Solution
Correct Answer
(A) \(3\)
Step-by-step Solution
Detailed explanation
\(\omega_f^2 = \omega_i^2 + 2\alpha\Delta\theta\) \(\left(\frac{\omega_0}{3}\right)^2 = \omega_0^2 + 2\alpha(24)\)
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