it is speed of motion and direction of motion
piston
The direction of their motion changes randomly.
a force
MOTION: A body is said to be in motion if it changes it's position with respect to it's surrounding. REST: A body is said to be in rest if it does not changes it's position with respect to it's surrounding.
The resistance of an object to changes in its motion is known as inertia. Changes in an objects motion include changes in its speed and direction.
in uniform motion velocity not changes with time but in non uniform motion velocity changes with time.
it is speed of motion and direction of motion
the motion of a wave changes when it moves
All objects resist changes in their state of motion
motion occurs when an object changes its position relative to a reference point.
One feels the changes in velocity, or acceleration, when the motion of the vehicle changes.
Newton's Theory.
piston
The direction of their motion changes randomly.
velocity
when the motion of an object accelerates it either increases speed, decreases speed, or it changes direction.