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Phy 201
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.
** Collaborative Labs_labelMessages.txt **
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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?
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Similar to the rotating strap experiment, I would like to use a similar setup, with different size masses on either end of the strap at different lengths away from the axis of rotation. I could then measure that distance and assign a mass to each object. This would allow me to calculate the inertia of each object. I would also want to time the system as it rotates to allow me to calculate angular velocity, angular acceleration and torque.
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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?
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I would like to test the idea of centripetal force. I could attach a ball of given mass to a string of which I would measure the length. Then I would hold on to one end of the string and swing it around in a circle in the frontal plane. I would have to time each revolution and then I could calculate centripetal acceleration and centripetal force.
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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?
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I would like to try to prove the concept that an object rotating about an axis has a higher kinetic energy the farther away it is from the axis of rotation. I would need the metal strap placed around an axis of rotation, and a known mass placed at different lengths away from the axis for each trail. Then I would calculate the inertia of the mass based on its mass and distance from the axis. I would also need to measure the amount of time per rotation to determine the angular velocity. This is all I would need to calculate the object’s kinetic energy, the formula being KE= ½*I*omega^2.
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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?
30 mins
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Very good.
Thanks.
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