The forces, which meet at one point and their lines of action also lie on the same plane, are known as

The angle of the inclined plane at which a body just begins to slide down the plane, is called helix angle.

Moment of inertia of a hollow rectangular section as shown in the below figure about Y-Y axis, is not the same as that about X-X axis.

Mass moment of inertia of a thin rod about its one end is __________ the mass moment of inertia of the same rod about its mid-point

A non-reversible machine is also called a self-locking machine.