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Physics · PYQ NEET UG 2022
हिन्दीThe angular speed of a fly wheel moving with uniform angular acceleration changes from \( 1200\text{ rpm} \) to \( 3120\text{ rpm} \) in \( 16\text{ seconds} \). The angular acceleration in \( \text{rad/s}^2 \) is:
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Correct answer · Option D
\( 4\pi \)
Explanation
Angular acceleration \( \alpha = \frac{\omega_2 - \omega_1}{t} = \frac{\frac{2\pi(3120 - 1200)}{60}}{16} = \frac{2\pi \times 1920}{60 \times 16} = \frac{3840\pi}{960} = 4\pi\text{ rad/s}^2 \).
