Mr. Yerington’s Updates

News and Information from Mr. Yerington’s Classroom

Levers and Pulleys Test – 2009

Posted by iateacher on March 1, 2009

Attention Parents, Guardians and Students:

We are almost done with our Levers and Pulleys unit.  The final test will take place this Friday, March 6.  First, there is an online version of the test which you can access here.  Second, the following items will help guide you (or your student) in what to study:

VOCABULARY

  • lever
  • lever arm
  • load
  • fulcrum
  • effort
  • spring scale
  • Newton
  • diagram
  • advantage
  • pulley
  • simple machine

OTHER

  • Be prepared to correctly read a spring scale
  • Be prepared to correctly diagram one or more lever systems (using the proper symbols)
  • Be able to correctly label several real-world levers with the load, fulcrum and effort symbols and direction of force
  • Be able to tell which pulley systems WILL and WILL NOT provide the user with an advantage by reducing the effort
  • Be able to calculate the effort needed to lift a load in a particular pulley system
  • Know how far one must pull the rope in order to move the load specified distance
  • Be able to identify pulley systems that WILL and WILL NOT work properly
  • Explain how to load a large boulder into a truck using a lever and a pulley (separately – not together…)

The test will be 52 points.  If students have questions about any of the following I encourage them to see me BEFORE the test day for help!  We will review on Wednesday with a game, and Thursday with a power point!

Thanks

Mr. Yerington

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