in a closed system
Energyin
= Energyout
Written in Equation Form
Here is an example!
Your body uses the chemical energy of food to move, and the
kinetic energy from moving is transferred to the paddle, it
contacts the ball which gains gravitational energy as it rises
higher above the table. That energy is changed back into
kinetic as the ball falls and lastly, the system is constantly
loosing energy because of friction which is converted to heat.
If we could bottle up the the whole of the system food and all
we will find that no energy was ever lost.
When one hits a ping pong ball what
happens to all that Energy?
It changes! Energy cannot be created or
destroyed it just changes phases. Its a fundamental law!
Conservation of Energy
