Three identical solid cylinders rotate freely about the same vertical axis with no…
PHYSICS · Single correct · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion
Problem
Three identical solid cylinders rotate freely about the same vertical axis with no significant external torque. Each cylinder starts with the same non-zero angular momentum.
• Student A suddenly extends her arms outward, doubling her moment of inertia.
• Student B keeps her arms fixed, so her moment of inertia is unchanged.
• Student C pulls her arms inward, halving her moment of inertia.
Rank the students’ final angular speeds from greatest to least.
(a) A, B, C
(b) B, C, A
(c) C, B, A
(d) C, A, B