Physics Course/Periodic Motion
Periodic Motion
editPeriodic motion refers to any motion moving at a distance above and below the equilibrium position and this motion keeps repeat itself over a period of time. This type of motion is also called Oscillation .
Examples
edit- The moving up and down of a spring
- The swinging side by side of a pendulum
Analysis
editThe moving up and down of a spring
editWhen apply a force on an object of mass m attach to a spring , the spring will move a distance y above and below the equilibrium point
The force acts on the object is
- F = m a
The Restoring Force of spring is given by Hook's law as
- Fs = - k y
When The Net Force on the system is 0 then there is no movement
- F - Fs = 0
- m a = - k y
- y =
- a = -
- v t =