potential and kinetic energy
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Potential and Kinetic Energy ENERGY IN GENERAL Energy: the ability to do work It can be found in many forms. Energy can be converted from one form to another. Although energy can be changed, it cannot be created nor destroyed. Potential Energy Stored energy

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Presentation Transcript
energy in general
ENERGY IN GENERAL
  • Energy: the ability to do work
  • It can be found in many forms.
  • Energy can be converted from one form to another.
  • Although energy can be changed, it cannot be created nor destroyed.
potential energy
Potential Energy
  • Stored energy
  • Example: If you stretch a rubberband, you will give it potential energy. As the rubberband is released, potential energy is changed to kinetic energy.
  • Example: When a roller coaster is at the top of a hill, it has a high amount of potential energy. As the coaster moves down the hill, the potential energy is changed to kinetic energy.
kinetic energy
Kinetic Energy
  • Energy of motion
  • Example: When you are walking or running your body is exhibiting kinetic energy.
  • Example: A yo-yo falling is an

example of kinetic energy.

energy changing forms
Energy Changing Forms
  • Some stoves transform chemical energy (gas, wood, coal ) into heat energy.
  • Wind mills use the kinetic energy from air molecules to transform it into electrical energy.
  • Hydroelectric plants transform

kinetic energy of falling water

into electrical energy.

your turn
Your Turn!!!!
  • Suppose there is an apple hanging from a tree and it is fixing to fall to the ground.
  • Is there potential energy present?
  • Is there kinetic energy present?
  • Where is the potential energy the greatest?
  • Where is the kinetic energy the greatest?
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Suppose a child was at the top of a playground slide waving at his Mom and he was fixing to slide down.
  • Is there potential energy present?
  • Is there kinetic energy present?
  • Where is the potential energy the greatest?
  • Where is the kinetic energy the greatest?
energy and work
Energy and Work
  • Work: result of a force acting on a body and producing motion
  • Ex: If you push a desk across the floor, you are doing work on the desk because you are exerting a force that causes motion.
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