potential and kinetic energy. what is energy? energy – the ability to do work – does not have...
TRANSCRIPT
Potential and Kinetic
Energy
What is Energy?• Energy – the ability to do work–does NOT have mass or take up space–Measured in the unit joules
• 2 categories of energy–Potential Energy–Kinetic Energy
Forms of EnergyPotential Energy Kinetic Energy
Chemicalstored energy in bonds
Thermalenergy of moving particles (heat)
Elasticstored energy due to tension
Mechanicalenergy found in objects in motion
Nuclearstored energy in the nucleus of an atom
Electricalmovement of electrons
Gravitationalstored energy due to position above
ground
Soundlongitudinal waves that are heard
EM Wavesall the waves in the EM spectrum move
• Energy can take different forms
Law of Conservation of Energy
• Law of Conservation of Energy – no new energy is created nor destroyed, it’s just transferred from one form to another
Potential Energy• Potential Energy – stored energy of
position; the energy of rest.–Has the “potential” to do something
Kinetic Energy• Kinetic Energy – energy of motion
Energy Transformation•When you lift the marble off
the ground it gets potential energy because of its height
Energy Transformation• As the marble moves down the
track, it loses potential energy, and is converted into kinetic energy
Energy Transformation• The marble slows down as it goes
uphill because kinetic energy is being changed back into potential energy
Energy Transformation
Animated Roller Coaster
Energy Conversion
Energy Conversion
Energy Conversion
What kind of energy transformations are occurring here?
Potential or Kinetic?
Moving car
Kinetic
Potential or Kinetic?
Tree branch
Potential
Potential or Kinetic?
Bent car fender
Potential
Potential or Kinetic?
Balloon filled with water
Potential
Potential or Kinetic?
Log of wood
Potential
Potential or Kinetic?
Balloon squirting around
Kinetic
Potential or Kinetic?
Person inside a moving car
Kinetic
Potential or Kinetic?
Both
Potential or Kinetic?
Both
Potential or Kinetic?
Both
Potential or Kinetic?
An airplane circling in preparation for landing
Kinetic
Potential or Kinetic?
A pile of coal that will be used for fuel
Kinetic
Potential or Kinetic?
An unlit firecracker
Potential
Potential or Kinetic?
Glucose stored in plants as a result of photosynthesis
Potential
Potential or Kinetic?
Burning log of wood
Kinetic
Potential or Kinetic?
A dam holding back a river’s water
Potential
Potential or Kinetic?
A marble rolling down the aisle
Kinetic
Potential or Kinetic?
A new car battery
Potential
Potential or Kinetic?
An ant crawling across a sandwich
Kinetic
Potential or Kinetic?
A tennis racket about to crash down on a ball
Potential
Potential or Kinetic?
Energy at rest
Potential
Potential or Kinetic?
A mousetrap set and ready to spring
Potential