# Motion

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Motion is the acceleration, displacement, or velocity (English unit $$ft$$, Metric unit $$m$$) of an object relative to a given frame of reference.  There are four basic types of motion with each one moving different than the other.  There is a fifth called irregular motion which does not actually count as one.

## Motion Types

• Linear motion is anything that moves in a straight line.
• Oscillating motion (simple harmonic motion) moves repeatedly back and forth.
• Rotary motion is anything that moves in a circle.
• Reciprocating motion moves backwards and forwards in a straight line.
• Irregular motion is any motion that has no fixed pattern.

## Brownian Motion

The random movement of particles suspended in liquids or gases caused by the collision of molecules of the surrounding medium.

Tags: Equations for Motion