Lesson 4.2: Friction
Completion requirements
Lesson 4.2: Friction |
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| Friction is something that is both useful and a problem. When you need friction to do something like ride your bike, it is good to have it. When friction causes the bearings in your bike to stop working, it is not a good thing. View the above media clip. |
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Answer the following self-check questions. |
| Question 1. |
When does friction occur?
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| Question 2. |
On what does the magnitude of friction depend?
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| Question 3. |
When is friction a useful thing?
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| Question 4. |
When is friction not a useful thing?
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| Question 5. |
What is an important byproduct of friction?
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