PIRA 1S10.10 Kepler's Second Law
Photo shows the demonstration used at the U.T. Austin Physics Dept.
- This demo contains Sulfur powder. Under no circumstances should the instructor or demo worker operate this demo without gloves.
- The MSDS is with the demo at all times.
- DO NOT touch your skin or clothing when wearing gloves.
- Verify that the demo is plugged in and that the power strip is on.
- Release the pendulum such that an elliptical orbit is made.
- Stop the pendulum and rest the chain on the tripod stand.
- Use the time markers to measure the sections of the orbit that are equal in time.
- Confirm Kepler's Second Law.
- In equal time intervals, the areas swept by the elliptical path are also equal.
Photos show the demonstration used at the U.T. Austin Physics Dept.
Demo Worker Instructions:
- Wear proper PPE before handling the demo .
- Place the black board in between the tripod stand.
- Pour small amount of sulfur powder from the small glass container labelled "used" onto the black board. Use about as much sulfur shown in the figure on the left below.
- Use the brush and spread the powder thinly onto the board. The board should look like the figure shown on the right below.
- Plug one end of the cable into the black board and the other end into the tripod stand. When delivering, plug in the power source.
- Once the demo is returned, pour the remaining sulfur powder into the glass container labelled for disposal as best as you can. The container is pictured below.
- Wash the remaining remnants off of the black board in the sink with soap and water.
- Wash the table that the demo was used on with soap and water.
- Wash the brush with soap and water.
- Dry the table and black board and store in the designated demo container.
Last Updated 2023 - University of Texas at Austin Physics Dept.
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