Teacher Page

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Teacher Page

• IV. Force, Motion and Mechanical Energy
• C. Interactions of Forces and Motion
• State Standards 1.6 1.8 2.1 2.3 2.5 4.1
• 7th grade assessment
• Students should know that mechanical energy comes
  form the motion (kinetic energy) and/or position
  (potential energy) of an object.
• View lesson before using with students. Sample
  questions and answers appear with mouse click or
  automatically.

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ENERGY
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What are the two basic kinds of energy?

• Kinetic

• Potential

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What is kinetic energy?

• The energy of motion.
• Depends on the mass and velocity of an object.
• Kinetic energy increases as mass increases.
• Kinetic energy increases when velocity increases.

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What is potential energy?

• Energy that is stored.
• Energy an object has because of its position or
  condition.
• Energy that is associated with objects that can
  be stretched or compressed.
• Energy that depends on height.

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Have you ever ridden a roller coaster at an
amusement park?
Hypothesize Does the speed of a roller coaster
depend on how tall the hills are? If so
which would give the faster ride - tall hills or
lower hills.
Write a hypothesis in your science journal.
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How would you test your idea?

• Roll a marble from rest down the groove in a
  ruler.
• The marble hits an object which then moves.
• Vary the height of the top of the ruler.
• The distance the object moves is a measure of how
  fast the marble was moving.