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Two forces, each equal to F, act as show...

Two forces, each equal to F, act as shown in (figure) Their resultant is

A

`F//2`

B

`F`

C

`sqrt(3) F`

D

`sqrt(5)F`

Text Solution

Verified by Experts

The correct Answer is:
B
Note that the angle between two forces is `120^(@)` and not `160^(@)`
`R^(2)=F^(2) +F^(2)+2F^(2) cos 120^(@)`
`=2F^(2)+2F^(2) (-1/2) F^(2)`
or `R=F`
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