Question

If the resultant of two forces of magnitudes P and Q acting at a point at an angle of `60^(@)` is `sqrt(7) Q` , find the value of ratio P/Q ?

Answer 1

Correct Answer - 2
`(sqrt(7)Q)^(2)=p^(2)+Q^(2)+2PQcos 60^(@)`
`6Q^(2)=p^(2)+PQ`
`((P)/(Q))^(2)+((P)/Q)-6=0`
`(P)/(Q)=2, " " (P)/(Q)!=-3("magnitude never be negative")`