Question

Two forces of magnitude a neat and clean nitin respectively at. If the resultant force is 17 newton the angle between the forces has to be

Answer 1

Explanation:

By applying formula F = a²+b²+2abcosθ

Solution 17²= 8²+15²+2.8.15.cosθ

17²= 8²+15²+2.8.15.cosθ289= 64+ 225+ 240cosθ

17²= 8²+15²+2.8.15.cosθ289= 64+ 225+ 240cosθ240cosθ= 0

17²= 8²+15²+2.8.15.cosθ289= 64+ 225+ 240cosθ240cosθ= 0cosθ= 0

17²= 8²+15²+2.8.15.cosθ289= 64+ 225+ 240cosθ240cosθ= 0cosθ= 0θ= 90°