A) ring, disc, sphere
B) sphere, disc, ring
C) disc, ring, sphere
D) sphere, ring, disc
Correct Answer: B
Solution :
Increasing order of moment of inertia of sphere, disc and ring \[{{I}_{s}}<{{I}_{d}}<{{I}_{r}}\] Moment of inertia of sphere is minimum. \[\therefore \]it will reach the bottom first. (because due to its least M.I., it oppose the rotational motion minimum)
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