Question

the resultant of two forces 15 Newton and F is 20N inclined at 60 degree to the 15 Newton force find the magnitude and direction of force [ do this question by parallelogram law

Answer 1

vector A + Vector B = √ A² + B ² + 2AB cos theta

= √15² + 20 ² + 2*15*20 * 1/2

=√ 225 + 400 + 300

= √925