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A ball of mass 0.6 kg attached to a ligh...

A ball of mass `0.6 kg` attached to a light inextensible string rotates in a vertical circle of radius `0.75 m` such that it has speed of `5 ms^(-1)` when the string is horizontal. Tension in the string when it is horizontal on other side is `(g = 10 ms^(-2))`.

A

30 N

B

26 N

C

20 N

D

6 N

Text Solution

Verified by Experts

The correct Answer is:
C
Given v= `sqrt(3rg)=5 ms^(-1)`
`therefore` tension T=`(mv^2)/( R)=20` N
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