The angle of inclination of the plane, at which the body begins to move down the plane, is called ________.

In a screw jack, the effort required to lift the load W is given by _____ where α is helix angle and Φ is the angle of friction.

The efficiency of a screw jack is given by _______.

The radius of a friction circle for a shaft of radius r rotating inside a bearing is ______.

The efficiency of a screw jack is maximum when _______.

The maximum efficiency of a screw jack is ______.

The frictional torque transmitted in a flat pivot bearing, considering uniform pressure, is ________.

The frictional torque transmitted in a conical pivot bearing, considering uniform wear, is ______.

The frictional torque transmitted by a disc or plate clutch is the same as that of _______ bearing.

The frictional torque transmitted by a cone clutch is the same as that of ________ bearing,