Question

17. If resultant of two forces F and F is v2 F The angle between two forces is : (A) 0° (B) 45° (C) 60° (D) 90°. ​

Answer 1

Answer:

Step-by-step explanation:

root(f^2+f^2+2f^2cos theta) =root2f

squaring both sides

2f^2+2f^2cos theta =2f^2

so cos theta =0

theta = 90 degrees