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A mass of 10 kg is suspended from a spri...

A mass of 10 kg is suspended from a spring balance. It is pulled aside by a horizontal string so that it makes an angle of `60^(@)` with the vertical. The new rading of the balance is

A

` 10 sqrt(3) kg wt `

B

` 20 sqrt(3) kg wt `

C

` 20 kg wt`

D

10 kg wt

Text Solution

Verified by Experts

The correct Answer is:
C
From the figure at position A, the reading of balance will be the tension T in the spring As the spring balance is in equilibrium position at A , hence
`T cos 60^@ = 10 kg wt`
` or T= (10 )/( cos 60^@ ) = (10)((1//2)) = 20 wt`
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