## anonymous one year ago the resultant of two forces 3N and 4N making an angle 90 with each other is a) 1N b) 7N c) 5N d) 3.5N

1. anonymous

the answer would be 5N apply this formula for resultant $\sqrt{A ^{2}+B ^{2}+2AB \cos \theta}$ cos90=0 so, $\sqrt{4^{2}+3^{2}}=\sqrt{16+9}=\sqrt{25}=5$

2. anonymous

is it correct equation?

3. anonymous

they are at 90 degree with each other. why is not sin theta in place of cos theta?

4. anonymous