1.

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»

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°



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