railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Mechanics Equilibrium and Friction Equilibrium
If two forces act at a right angle (90°), what will be the magnitude of their resultant force?
1
\(R = \sqrt{F_1^2 + F_ 2^2}\)
2
\(R = F_1 - F_2\)
3
\(R = 2F_1F_2\cos\theta\)
4
\(R = F_1 + F_2\)