" Object at rest stay at rest, object in motion stay in motion, unless and external force acts on it."

Inertia: Tendency of an object resist change in motion due to mass.


  • The acceleration, a, which may be supposed uniform, is 1.465.

    Per hour the horse-power required is reduced to about one-third of that required foracceleration alone.

    They were seen stringing up motion sensors earlier.

    He kicked the mule into motion and started out across the sand.