Physics · Rotational Mechanics
A boy rotates a circular chhuri (ring) of mass M and radius R on a stick. The radius of the path traced out by the point where the chhuri and the stick are in contact is r. The chhuri rolls without slipping on the stick, and the coefficient of friction between the chhuri and the stick is μ, with the acceleration due to gravity being g. What is the minimum angular frequency (ω) at which the stick must be rotated to ensure that the chhuri does not fall off the stick? Assume r << R.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1μg / R
- 2μg / 2R
- 3√(gμR)✓
- 4√(g / R)
Correct answer
√(gμR)
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