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A stone of mass 0.3 kg attched to a 1.5 ...

A stone of mass `0.3 kg` attched to a `1.5 m` long stirng is whirled around in a horizontal cirlcle at a speed of 6 m/s The tension in the string is

A

`10N`

B

`20 N`

C

`7.2N`

D

`30 N`

Text Solution

Verified by Experts

The correct Answer is:
C
Here, mass of the stone, m=0.3 kg
Length of the string, R= 1.5 m
Speed, v= 6 m/s
Tension in the string = centripetal force
` therefore T=(mv^2)/(R ) = ((0.3 ) (6)^2)/(1.5 ) = 7.2 N`
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