A weight w is sasponded from the mid -point of a tope whose ends are at the same level In after in make the rope perfectly horizontalthe force applied to each of its ends must be

Options

A. less then `w`
B. equal to `w`
C. equal to `2 w`
D. infinitly large

Answer

d

Explanation

For equilibrium of body
`mg = 2T cos theta`
`T = (mg)/(2 cos theta)`
For the string to be horizontal
`theta = 90^(@)`
`T = (mg)/(2 cos 90^(@))`
`rArr T = oo`