Physics Course/Periodic Motion

Periodic Motion Periodic 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 The moving up and down of a spring The swinging side by side of a pendulum Analysis The moving up and down of a spring When 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 = The swinging side by side of a pendulum