Saved Bookmarks
| 1. |
Two equal vectors have their resultant equal to either at what angle they are inclined |
| Answer» SOLUTION :Solution :HereA=F,B=F,R=F,θ=?Solution :HereA=F,B=F,R=F,θ=?Now R=A2+B2+2ABcosθ−−−−−−−−−−−−−−−−−√Solution :HereA=F,B=F,R=F,θ=?Now R=A2+B2+2ABcosθ−−−−−−−−−−−−−−−−−√F=F2+F2+2F.F.cosθ−−−−−−−−−−−−−−−−−−√Solution :HereA=F,B=F,R=F,θ=?Now R=A2+B2+2ABcosθ−−−−−−−−−−−−−−−−−√F=F2+F2+2F.F.cosθ−−−−−−−−−−−−−−−−−−√F2(1+cosθ)−−−−−−−−−√Solution :HereA=F,B=F,R=F,θ=?Now R=A2+B2+2ABcosθ−−−−−−−−−−−−−−−−−√F=F2+F2+2F.F.cosθ−−−−−−−−−−−−−−−−−−√F2(1+cosθ)−−−−−−−−−√⇒1=2(1+cosθ)Solution :HereA=F,B=F,R=F,θ=?Now R=A2+B2+2ABcosθ−−−−−−−−−−−−−−−−−√F=F2+F2+2F.F.cosθ−−−−−−−−−−−−−−−−−−√F2(1+cosθ)−−−−−−−−−√⇒1=2(1+cosθ)cosθ=−12=cos120∘⇒θ=120∘ | |