engineering recuitment HPCL Junior Executive 2025 Mock Test Engineering Mechanics Equilibrium and Friction
A pushing force making an angle θ to the horizontal is applied on a block of weight W placed on a horizontal table. If the angle of friction is α, then the magnitude of force required to move the body is equal to
1
\(\frac{{mg\sin \alpha }}{{g\tan \left( {\theta - \alpha } \right)}}\)
2
\(\frac{{mg\cos \alpha }}{{\cos \left( {\theta + \alpha } \right)}}\)
3
\(\frac{{mg\sin \alpha }}{{\cos \left( {\theta + \alpha } \right)}}\)
4
\(\frac{{mg\tan \alpha }}{{\sin \left( {\theta - \alpha } \right)}}\)