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Two equal forces have their resultant eq...

Two equal forces have their resultant equal to either. At what angle are they inclined ?

Text Solution

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Here, ` A = B = R=x (say)`
As, ` R = sqrt (A^2 + B^2 + 2 AB cos theta` )`
:. ` x^2=x^2 +x^2 + 2 xx cos theta`
or ` 1=1 + 1 =2 cos theta`
or ` cos theta =- 1/2 + 2 cos 120^@`
or ` theta = 120^@ s` .
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