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Here the students learn that it requires .80 joules of work (2 newtons x .40 meters) to lift the weights. |
Here the students learn that it requires .60 joules of work (1.5 newtons x .40 meters) to lift the weights. |
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Here the students explore the properties of levers (effort arm/resistance arm, fulcrum) by constructing one using a meter stick and chalkboard eraser. |
Here the students explore the properties of pulleys and compare the amounts of work needed to lift the dictionary. |
Name - _____________________
Simple and Compound Machines
Centers
- What did the meter stick act as? __________________
- What did the eraser act as? ____________________
- Use the following terms to draw and label the lever you
- Where did you place the eraser for the work to be the
created: effort arm, resistance arm, fulcrum.
easiest? _________________ hardest?___________
- Complete activity on page F72.
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force |
height |
work (force x height) |
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lifting marbles |
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pulling marbles |
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force |
height |
work (force x height) |
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single pulley |
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two pulley |
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in-line |