બે બળોના મૂલ્યોનો સરવાળો 18 N અને તેમનું પ

Let $P$ be the smaller force and $Q $ be the greater force then according to problem -

$P + Q = 18$......$(i)$

$R = \sqrt {{P^2} + {Q^2} + 2PQ\cos \theta } = 12$.......$(ii)$

$\tan \varphi = \frac{{Q\sin \theta }}{{P + Q\cos \theta }} = \tan 90 = \infty $

 $P{\rm{ }} + {\rm{ }}Q{\rm{ cos}}\theta = 0$.......$(iii)$

By solving $(i)$, $(ii)$ and $(iii)$ we will get $P = 5,$ and $Q = 13$