Question

If two forces of magnitude 7N and 8N act at 60 degree ,then the resultant will be

Answer 1

Answer:

15.02

Explanation:

$\sqrt({f1 {}^{2} } + f2 { }^{2} + 2f1f2 \sin( \alpha ) )$

so

f1=7N

f2=8N

so

$\sqrt{(7 {}^{2} + {8}^{2} + 2 \times \times 7 \times \sin(60) }$

$\sqrt{49 + 84 + 112 \times \sqrt{3} \div 2 } = 15.02$