Forces ${F_1}$ and ${F_2}$ act on a point mass in two mutually perpendicular directions. The resultant force on the point mass will be
${F_1} + {F_2}$
${F_1} - {F_2}$
$\sqrt {F_1^2 + F_2^2} $
$F_1^2 + F_2^2$
Forces ${F_1}$ and ${F_2}$ act on a point mass in two mutually perpendicular directions. The resultant force on the point mass will be
$F = \sqrt {F_1^2 + F_2^2 + 2{F_1}{F_2}\cos 90^\circ } $$ = \sqrt {F_1^2 + F_2^2} $