Square of the resultant of two forces of equal magnitude is equal to three times the product of their magnitude. The angle between them is
Square of the resultant of two forces of equal magnitude is equal to three times the product of their magnitude. The angle between them is
A. `0^(@)`
B. `45^(@)`
C. `60^(@)`
D. `90^(@)`
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Correct Answer - C
`(sqrt(F^(2)+F^(2)+2F^(2)cos theta))^(2)=3(F)(F)`
`2F^(2)+2F^(2)cos theta=2F^(2)`
`cos theta=(1)/(2)rArrtheta=60^(@)`
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