A Body Is In Equilibrium When Three Forces Act On It,two Of The Forces Are F1 Of Magnitude 8n Acting Dud East And F2 Which Is 5n Acting N60degree East.Find The Magnitude And Direction Of The Third Force.

Answer 1

You want <x,y> such that

<8,0>+<5cos30°,5sin30°>+<x,y> = <0,0>

then you can get the direction of <x,y>