Question

Two force of 5N each act a point incilen at 120° with each other the magnititud of the vector addition of these forces what

Answer 1

root (5^2+5^2+ 2×5×5 cos120)
=5root (1+1+2cos 120)
=5root (1+1+2×(-0.5))
=5root (1)
=5N