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A solid ring, sphere and a disc are roll...

A solid ring, sphere and a disc are rolling down from the top of the same height, then the sequence to reach on the surface is

A

Ring, disc, sphere

B

sphere, disc, ring

C

Disc, ring, sphere

D

Sphere, ring, disc

Text Solution

Verified by Experts

The correct Answer is:
B
Time of descent `prop` moment of inertia `prop (k^(2))/(R^(2))`
`((k^(2))/(R^(2)))_("sphere") = 0.4, ((k^(2))/(R^(2)))_("disc")= 0.5, ((k^(2))/(R^(2)))_("ring")= 1 therefore t_("sphere") lt t_("disc") lt t_("ring")`.
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