Statistics Test...

Three coplanar forces each of weight 10 kilogram are acting at a particle. If their line of actions make same angle, then their resultant force will be

A circular ring having radius 3 cm hanged 4 cm above the centre of ring by four string on equal interval of circumference. If angle between two consecutivestrings is θ, then cos θ will be

A uniform triangular lamina whose sides are of length 3 cm, 4 cm and 5 cm, is suspended by a string tied at the middle point of the largest side. In equilibrium position the inclination of this side to the vertical is

A uniform beam of length 2a rests in equilibrium against a smooth vertical plane and over a smooth peg at a distance h from the plane. If θ be the inclination of the beam to the vertical, then sin³θ is

A rough plane is inclined at an angle α to the horizon. A body is just to slide due to its own weight. The angle of friction would be

A particle is resting on a rough inclined plan with inclination α. The angle of friction is λ, the particle will be at rest if and only if,

A body of weight W rests on a rough plane, whose coefficient of friction is μ (= tan λ ) which is inclined at an angle αwith the horizon. The least force required to pull the body up the plane is

The coefficient of friction between the floor and a box weighing 1 ton if a minimum force of 600 kg is required to start the box moving is

A body is in equilibrium on a rough inclined plane of which the coefficient of friction is (1/√3) . The angle of inclination of the plane is gradually increased. The body will be on the point of sliding downwards, when the inclination of the plane reaches

A body of weight 40 kg rests on a rough horizontal plane, whose coefficient of friction is 0.25. The least force which acting horizontally would move the body is