Written by Jerry Ratzlaff on . Posted in Classical Mechanics

motion bannerMotion is the acceleration, displacement, or velocity 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.

Types of Motion

  • 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.

Linear Motion Formula

\(\large{ s =  v_i + at  }\)

\(\large{ s = \frac{1}{2} \left( v_i + v_f \right) t  }\)

\(\large{ s = v_i t + \frac{1}{2} at^2  }\)

\(\large{ s = v_f t - \frac{1}{2} at^2  }\)


\(\large{ s }\) = displacement (linear motion)

\(\large{ a }\) = acceleration

\(\large{ v_f }\) = final velocity

\(\large{ v_i }\) = initial velocity

\(\large{ t }\) = time


Tags: Equations for Motion