Inertial Mass

An object's resistance to a change in its velocity. Measured in kilograms.

The force required to change the velocity of a body is give by Newton's Second Law:

The rate of change of momentum of a body is directly proportional to the external force acting on the body and takes place in the direction of the force.

where

F = force acting on the body [N]

m = mass of the body [kg]

v = velocity of the body [ms^-1]

a = acceleration of the body [ms^-2]

See also: Gravitational Mass, Mass.