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Phy 121
Your 'collaborative labs' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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You have completed the first series of collaborative labs.
In that series you developed some important skills with teamwork, collaboration and communication. By now you have also developed additional lab techniques and insights, as well as an expanded understanding of physics and the standard formulations of motion, energy, momentum, forces and other topics.
You now have a good idea of the function of each member of the team, the designer, the experimenter, the analyzer and the interpreter.
You are also familiar with the items in your lab materials package.
The second series of activities will be spread out over the remainder of the semester. The investigations in this series will be more substantial and extensive than those of the first series, though we will limit the scope to keep the workload reasonable.
Please give a brief statement of three proposals for the second series of investigations, relevant to the topics of the labs you have performed and/or the material covered so far in the course. It should be possible to conduct your proposed investigations using the materials in the lab package, and/or common items you can expect your team members to have.
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Discuss your first idea. How do you think it might be tested? What sort of items do you think might be required? How do you think your idea might be tested?
My first idea is to hold a balloon filled with water out attached to a string. The string will be attached to the metal piece in our lab kits. The balloon will only be halfway filled with water. Start the timer and time how long each time it takes the balloon to hit the metal piece. Does it speed up, does it slow down, does it bust, etc. If it busts, how many times did it take hitting the piece before it busted. This may take a couple of times to record accurate results.
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Discuss your second idea. How do you think it might be tested? What sort of items do you think might be required? How do you think your idea might be tested?
Using the race car that is in our lab kits, construct a race way with the blue 2inch pieces in our lab kits. It can be level or sloped downhill. Once again bring out the timer program on your computer and time how long it takes the race car to get from one end to the other. Record this ten times. Are there any discrepancies? What do you think the discrepancy is if answered yes? What were the times, mean, and standard deviation of the ten recorded times?
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Discuss your third idea. How do you think it might be tested? What sort of items do you think might be required? How do you think your idea might be tested?
Set up another race way like the one you set up in the experiment above. Use three marbles. All three marbles should be a different size. Using the Timer Program, record ten trials of each marble to find the mean and standard deviation. Decide, based on your results, which marble was fastest and which marble was slowest. Record each marble.
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Your instructor is trying to gauge the typical time spent by students on these activities. Please answer the following question as accurately as you can, understanding that your answer will be used only for the stated purpose and has no bearing on your grades:
• Approximately how long did it take you to complete this activity?
Thirty minutes.
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Good ideas. Thanks for submitting them.
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