TS EAMCET · Physics · Rotational Motion
A wheel of radius with 0.5 m and a moment of inertia of 10 kg. m2 is rotating freely at an angular speed of 70 rev/min. The wheel can be stopped in 5.0 s by pressing a wet cloth against the rim and exerting a radially inward force of 88 N. The coefficient of kinetic friction between the wheel and wet cloth is
- A 0.17
- B 0.33
- C 0.4
- D 0.6
Answer & Solution
Correct Answer
(B) 0.33
Step-by-step Solution
Detailed explanation
\( \omega_0 = 70 \text{ rev/min} = 70 \times \frac{2\pi}{60} \text{ rad/s} = \frac{7\pi}{3} \text{ rad/s} \) \( \alpha = \frac{\omega_f - \omega_0}{t} = \frac{0 - 7\pi/3}{5.0} = -\frac{7\pi}{15} \text{ rad/s}^2 \)…
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