Question

Two forces of 5kg wt and 10kg wt are acting at an inclination of 120
o
between them.
Find the magnitude and direction of resultant force.

Answer 1

Since you don't specify either force's direction,

let the 5N force act in the x direction. Its vector value is then (5,0)

The other force is then (-5,5√3)

Add them together to get (0,5√3)

That's 5√3 at right angle to the N force.