Question

Three forces P,Q and R are acting at a point in the plane. The angle between P & Q and Q & R are `150^(@) & 120^(@)` respectively, then for equilibrium, forces P,Q & R are in the ratio
A. `1:2:3`
B. `1:2:sqrt(3)`
C. `3:2:1`
D. `sqrt(3):2:1`

Answer 1

Correct Answer - 4
`vec(r) 2t^(2) hati-t^(3) hatj`
`X=2t^(2) " " y=-t^(3)`
`(x/2)^(3//2) =t " " y=-(x/2)^(3//2)`
`(x/2)^(3//2) +y=0`