Question

Exer
1. Choose the correct option.
i) The resultant of two forces 10 N and 15 N
acting along +x and - X-axes respectively,
(A) 25 N along + x-axis
(B) 25 N along - x-axis
(C) 5 N along + x-axis
(D) 5 N along - x-axis
​

Answer 1

Answer is D 5N along negative x axis
Formula:R= whole root of a^2+ b^2+ 2*a*b*cos theta
R= whole root of (10)^2+(-15)^2[as in negative x axis and vectors always add]+2*10*(-15)*cos180[as the angle between them is 180 degree]
R= whole root of 100N+225N[as power was even so negative will change into positive] + 2*10*(-15)*(-1)[as cos180 is -1]
R= whole toot of 100+225-300
R= whole root of (-25)
R= -(root of 25)
R=-5N

Hope it helps and if you like please mark it as the brainliest answer