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UNIT: |
Dynamics in 2 dim, circular motion
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PURPOSE: |
| 1. |
Illustrate various kinds of circular motion |
| 2. |
Demonstrate that the string tension provides the needed centripetal force |
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EQUIPMENT: |
A ball with a long string attached
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SUGGESTIONS: |
Demonstrate circular motion
| 1. |
Whirling in horizontal |
| 2. |
Whirling in vertical |
| 3. |
Pendulum motion |
| 4. |
Discuss the tension in each case, noting that it depends on the position in case 2 and 3, and would be infinite in case 1 if one could whirl the string in a horizontal plane. |
| 5. |
Ask what would happen to the ball if the required tension exceeded the maximum tension of the string in each case 1-3 |
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DISCUSSION: |
Requires a full discussion of circular motion, including tangential
and perpendicular (radial, centripetal) acceleration
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