Mechanical Advantage and Efficiency

Mechanical Advantage and Efficiency


Students will be able to explain the mechanical advantage of simple machines.

Here are your notes on MA.

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MA and efficiency

Be sure to pause, rewind, stop as necessary.

Source: Langhans and various other educators

MA and Efficiency: These are the “S” in WSQ. You must have them under your video notes completed by the due date on the Unit Plan.

1. Explain why mechanical advantage is so important.

2. You are moving a large piece of furniture upstairs. Why does a ramp make more sense to use than stairs?

3. When would a machine not have a mechanical advantage?

4. How would you increase the MA of a pulley?

5. If one kid has a great deal of mass and the fulcrum hasn't moved ( still centered) then the kid stay on the ground until he pushes with his legs. There is still no mechanical advantage. Why?

6. Why is efficiency so important? Explain at least 2 difference reasons.

7. Why are machines never 100% efficient?

8. Explain how energy relates to efficiency.


Source: Langhans

Question- asking Higher Order Thinking (HOT) questions; use the following as your guide:

1. A question that you are still confused about (be specific, include which part of the video, etc)
2. A question that connects the videos together (i.e. asking about the relationship between the content)
3. A question you think you know the answer to, but you want to challenge your classmates with
Use your Unit Plan to help with question starters

Source: inspired by C. Kirch