Kinetic and Potential Energy

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Kinetic and Potential Energy
By Amanda Rinaldi
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Objectives

• You will be able to define and identify Kinetic
  and Potential energy.
• You will be able to give examples of the two
  forms of energy.
• You will be able to explain how one can transfer
  to the other.

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Definition of Energy
The ability or capacity to do work. Measured by
the capability of doing work potential energy
or the conversion of this capability to motion
kinetic energy.
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Potential Energy

• Energy due to position or stored energy.

Measure by PE (weight) (gravity) (Height)
Potential energy is calculated by The objects
weight, multiplied by the earths gravitational
pull (9.8 m/sec sq), multiplied by the distance
the object can fall.
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Examples of Potential Energy
Stretching a rubber band.. -Stores energy
Water at the top of a waterfall.. -Stores
energy
YoYo in held in your hand.. -Stores energy
because of position
Drawing a Bow -Stores energy because of
position
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• When the position of an object is altered it,
  creates Potential Energy.
• A yo-yo on the table, doesnt have energy, but
  when picked up, it alters its position and now it
  has the ability (or potential) to do work.
• A bow doesnt have the capacity to do work,
  unless its held at an elevated position.

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Potential Energy Converted to Kinetic Energy
When stored energy begins to move, the object now
transfers from potential energy into kinetic
energy.
Standing still
Running
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Definition of Kinetic Energy
The energy of motion.
Measured by KE ½ (Mass) (Velocity)
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Kinetic energy is calculated by one half of the
objects mass, multiplied by the objects speed-
squared.
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Examples of Kinetic Energy

• Shooting a rubber band.
• Water falling over the fall.
• A Yo-Yo in motion.
• Releasing the arrow from the bow.

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Summary of What Youve Learned..

• Example using a coin
• Holding a coin in you hand, alters the coins
  original position.
• The coin has potential energy, because it has
  ability to do work.
• Dropping the coin in the bank, changes the stored
  energy into motion.
• This transfers the coins energy from potential
  to kinetic energy.

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Follow Up Activity

• You and a partner will collect at least 10
  objects.
• You will take these objects and test to see which
  has Potential and Kinetic energy or both.
• You will use a Microsoft program such as Excel or
  Word to make a chart or table organizing your
  data.
• Be creative with the objects you choose, and make
  sure you understand your results to present to
  the class.

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The End...