A mass of M kg is suspended by a weightl...

A mass of M kg is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of `45^@` with the initial vertical direction is

`(Mg)/(sqrt(2))`

`Mg(sqrt(2)-1)`

`Mg(sqrt(2)+1)`

`Mgsqrt(2)`

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