Introduction
Simple machines are a part of our everyday lives. We use them without knowing that we are using a simple machine. They are in our lives to make our lives easier. Complete the task below.
Task
Why do we use machines?
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Why do we use simple machines?
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What does “work” mean in science?
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Read each of the following statements and determine whether or not they represent examples of work.
A teacher applies a force to a wall and becomes exhausted. __________________
A book falls off a table and free falls to the ground. ________________
A rocket accelerates through space. ______________
What is the advantage of using a simple machine?
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What is a lever?
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Determine the following lever class with an example:
| Scenario | Lever Class | Example |
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Fulcrum is between effort and load |
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Load is between effort and fulcrum |
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| Effort is between load and fulcrum |
What is a pulley?
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What is a wheel and axle?
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Explain how a wheel and axle works.
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What is an inclined plane? Give examples
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