Question

there are 2 force vector of 5N and 12 N . if theor resultant is 13 then angle between force 5 N and 12 N is N ​

Answer 1

F1=5 N

F2=12 N

Fr=13 N

let x be the angle between them

we know that

Fr²=F1²+F2²+2F1*F1*cosx

169=144+25+2*5*12*cosx

0=2*5*12*cosx

therefore

cosx=0

x=π/2

Hope this helps.