Rotational Motion Question 219

Question: A thin ring, a disk and an annular cylinder, of same mass M, are released from a point 3.6m from the ground up an inclined plane of 30 degree inclination. The ring and the disk have the same radius R. Times taken by the ring and disk to reach the ground are in the ratio,

Options:

A) 2:1.5

B)1.4:1.5

C) 1.5:1.5

D)1.5:1.6

Show Answer

Answer:

Correct Answer: A

Solution:

[a]

t=1sinθ2hg1+K2R2t(1+K2R2)

so,t1:t2=2:1.5



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