Materials:
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- Hangar formed in the shape of an M with weights attached on the ends of the M.
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| Directions: |
- Place the center of the M on the head of a friend. As you direct your friend to turn
left or right (directions in degrees are easiest), the hangar actually stays in the same
position though your friend keeps turning and turning.
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| Safety Concerns: |
- There may be a concern with the hangar tips.
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| Questions: |
- What is happening here?
- Does it work better with on the heads of students than it does on the heads of others?
Why?
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| Concepts: |
- This is an example of Newton's first law: An object in motion tends to stay in motion
(and thus an object at rest tends to stay at rest). The body and head may move forward or
to the left or right, but the hangar stays in place. It will work best on a head with
little (or no) hair when the center of the hangar can rest freely (no force of hair acts
on the hangar as the head moves).
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