kinetic and potential energy
Kinetic Energy
Definition:
Kinetic energy is the energy an object has because it is moving.
Easy idea:
If something is moving, it has kinetic energy.
Examples:
A running child
A rolling ball
Flowing water
A moving car
Important point:
Faster movement = more kinetic energy
Heavier object = more kinetic energy
Fun fact:
When you stop running, your kinetic energy becomes heat energy in your body!
Potential Energy
Definition:
Potential energy is the energy stored in an object because of its position or shape.
Easy idea:
If something is ready to move but is not moving yet, it has potential energy.
Examples:
A book kept on a shelf
Water stored in a dam
A stretched rubber band
A bent bow
Important point:
Higher position = more potential energy
More stretch or bend = more potential energy
Fun fact
A stretched rubber band has no motion, but it can move suddenly because of its stored energy!
Connection Between Them
Potential energy can change into kinetic energy.
Example:
A ball on a table On table = Potential Energy Falling down = Kinetic Energy
Quick Comparison
Kinetic EnergyPotential EnergyEnergy of motionStored energyNeeds movementNo movement neededExample: runningExample: book on shelf