Volume, Density, Torque and Impulse
A body’s volume is the amount of space that it occupies. Density
combines the mass of a body with the body volume. Density is defined
as mass per unit of volume. A rotary effect created by an eccentric force
is known as torque or moment of force. Torque, which may be thought
of as rotary force, is the angular equivalent of linear force. Impulse is
defined as product of force and the time over which the force acts.