railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Mechanics Equilibrium and Friction Equilibrium
Two forces P and Q are acting at an angle θ and their resultant R makes an angle α with the force P, then
1
\(\tan \alpha=\frac{Q\sin \theta}{P+Q\cos \theta}\)
2
\(\tan \alpha=\frac{P\sin \theta}{P+Q\cos \theta}\)
3
\(\tan \alpha=\frac{P\cos \theta}{Q+P\sin \theta}\)
4
\(\tan \alpha=\frac{Q\sin \theta}{Q+P\cos \theta}\)