Force to Vibration

Remember Force

Force and Pressure

Force of a Spring

Sinusoidal Motion


Position and Velocity in Sinusoid

Sine wave

Motion in a Sound Wave?

Pressure Wave

Motion in a Sound Wave?

Sinusoidal Pressure Wave


Kinetic Energy

Potential Energy

Spring/Mass Energy

Sinusoidal Potential Energy

Sine PE

Sinusoidal Total Energy

Sine total energy

Energy in a Sound Wave.

First Law of Thermodynamics

  • The First Law states that the total amount of energy in a closed system is a constant.
  • A closed system is one where we are careful to include all the same particles before and after the experiment.
  • This is an absolute law. In centuries of searching no errors have ever been found.
  • In most systems it means that the sum of the kinetic and potential energies is constant.