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A mass M is hung with a light inextensib...

A mass `M` is hung with a light inextensible string. Tension in horizontal part of string is.

A

`sqrt(3)Mg`

B

`sqrt(2)Mg`

C

`(mg)/(sqrt3)`

D

`(mg)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
Here `T_(1)=T_(2)cos30=T_(2)(sqrt(3))/(2)`
(i) `T_(2)=(2)/(sqrt(3)T_(1)`
(ii) Also `Mg=T_(2)sin30^(@)(T_(2))/(2)`
`Mg=(2)/(sqrt(3))(T_(1))/(2)=(T_(1))/(sqrt(3))`
i.e., `T_(1)=sqrt(3)Mg` .
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