An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Dynamics
Field: Newtonian Mechanics
The branch of mechanics concerned with the motion of bodies under the action of forces.
Sequence of Expressions
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.\n
For every action, there is an equal and opposite reaction.