Question

If two forces 8N and 10N are acting on a body at an angle 60° then calculate the

resultant of these two forces?​

Answer 1

Explanation:

${r} = \sqrt{ {a}^{2} + {b}^{2} + 2ab \cos( \alpha ) } \\ r = \sqrt{ {8}^{2} + {10}^{2} + 2.10.8. \cos(60) } \\ r = \sqrt{64 + 100 + 80} \\ r \ = \sqrt{244} \\ r = 2 \sqrt{61}$