Strength of Materials The effort required to lift a load W on a screw jack with helix angle a and angle of friction<="" div=""> Wtan(a + <)>) Wsin(a + <(>) Wcos(a + ) Wtan(a-<)>) Wtan(a + <)>) Wsin(a + <(>) Wcos(a + ) Wtan(a-<)>) ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials Pick up wrong statement about friction force for dry surfaces. Friction force is independent of the area of contact surfaces dependent on the materials of contact surface proportional to velocity of sliding proportional to normal load between the surfaces independent of the area of contact surfaces dependent on the materials of contact surface proportional to velocity of sliding proportional to normal load between the surfaces ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials According to principle of transmissibility of forces, the effect of a force upon a body is Different at different points in its line of action The same at every point in its line of action Maximum when it acts at the center of gravity of a body Minimum when it acts at the C.G. of the body Different at different points in its line of action The same at every point in its line of action Maximum when it acts at the center of gravity of a body Minimum when it acts at the C.G. of the body ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials A single force and a couple acting in the same plane upon a rigid body cannot balance each other are equivalent balance each other produce moment of a couple cannot balance each other are equivalent balance each other produce moment of a couple ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials The center of percussion of the homogeneous rod of length L suspended at the top will be L/2 2L/3 3L/4 L/3 L/2 2L/3 3L/4 L/3 ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials The weight of a body is due to force of attraction experienced by par-ticles gravitational pull exerted by the earth gravitational force of attraction towards the centre of the earth. centripetal force of earth force of attraction experienced by par-ticles gravitational pull exerted by the earth gravitational force of attraction towards the centre of the earth. centripetal force of earth ANSWER DOWNLOAD EXAMIANS APP
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