Question

two forces F1 of magnitude 9N and f2 of 12 N make angle of 30° and 120° with x -axis respectively find the resultant​

Answer 1

Answer:

angle between the two forces is= (120-30)=90degree.

Therefore the resultant of the two forces will be=

$\sqrt{ {9}^{2} + {12}^{2} + 2 \times 9 \times 12 \cos(90) }$

=81+144=225N

Answer 2

Answer:

angle between the two forces is= (120-30)=90degree.

Therefore the resultant of the two forces will be=

\sqrt{ {9}^{2} + {12}^{2} + 2 \times 9 \times 12 \cos(90) }

9

2

+12

2

+2×9×12cos(90)

=81+144=225N