A stone is rotated in a vertical circle. Speed at bottommost point is 8gR where R is the radius of circle. The ratio of tension at the top and the bottom is
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a
1 : 2
b
1 : 3
c
2: 3
d
1 : 4
answer is B.
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Detailed Solution
T=mu2R+mgcosθ;v2=u2-2ghTtop =3mg and Tbottom =9mgTherefore, the ratio Ttop Tbottom =3mg9mg=13
A stone is rotated in a vertical circle. Speed at bottommost point is 8gR where R is the radius of circle. The ratio of tension at the top and the bottom is