Phys 201
Your 'cq_1_00.1' 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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I chose the Roll of tape competing against the swinging pendulum on a sloped 22-inch board raised up by a VHS-Tape box. The clock times were for the tape hitting the end of the ramp were: .875, .984, 1.422, .756, .875 seconds
In the following you don't have to actually do calculations with your actual data. Simply explain how you would use data of this nature if you had a series of several position vs. clock time observations:
• If you did use observations of positions and clock times from this video, how accurately do you think you could determine the positions, and how accurately do you think you would know the clock times? Give a reasonable numerical answer to this question (e.g., positions within 1 meter, within 2 centimeters, within 3 inches, etc; clock times within 3 seconds, or within .002 seconds, or within .4 seconds, etc.). You should include an explanations of the basis for your estimate: Why did you make the estimate you did?
->->->->->->->->->->->-> answer/question/discussion: I believe with the aide of slowing the video down, accurate measurements could be given within a centimeter and clock times could be given within .003 seconds. The ability to use stop motion and slide the playback over the video helps an observer see when the actual object comes to the end of the ramp. The clock also moves with the slow motion.
• How can you use observations of position and clock time to determine whether the tape rolling along an incline is speeding up or slowing down?
->->->->->->->->->->->-> answer/question/discussion:
You can determine whether the tape is speeding up or slowing down while rolling along an incline by taking different time measurements at different intervals of the path. If the frequency changes then the incline must be changing.
• How can you use observations of position and clock time to determine whether the swinging pendulum is speeding up or slowing down?
You can determine whether the pendulum is speeding up or slowing down by taking different time measurements at different intervals of the path. If the frequency changes then the incline must be changing.
->->->->->->->->->->->-> answer/question/discussion:
• Challenge (University Physics students should attempt answer Challenge questions; Principles of Physics and General College Physics may do so but it is optional for these students): It is obvious that a pendulum swinging back and forth speeds up at times, and slows down at times. How could you determine, by measuring positions and clock times, at what location a swinging pendulum starts slowing down?
You could determine the location a swinging pendulum begins to slow down, by dividing the arc of swing into sections and take measure the change in speed in these areas. You should see a change in momentum and be able to map the change based on the arc of swing.
->->->->->->->->->->->-> answer/question/discussion:
• Challenge (University Physics students should attempt answer Challenge questions; Principles of Physics and General College Physics may do so but it is optional for these students): How could you use your observations to determine whether the rate at which the tape is speeding up is constant, increasing or decreasing?
->->->->->->->->->->->-> answer/question/discussion:
In like manner, to determine if the speed of the tape if varying, you can divide the ramp into segments, take the changes in momentum for those intervals, and compare them. If there are differences, then determine if there is an increase or decrease at that point and why.
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45 minutes
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Better :-)
&#Very good work. Let me know if you have questions. &#
Phys 201
Your 'cq_1_00.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** **
Which object did you choose and what were the three positions and the three clock times?
->->->->->->->->->->->-> answer/question/discussion:
I chose the Roll of tape competing against the swinging pendulum on a sloped 22-inch board raised up by a VHS-Tape box. The clock times were for the tape hitting the end of the ramp were: .875, .984, 1.422, .756, .875 seconds
In the following you don't have to actually do calculations with your actual data. Simply explain how you would use data of this nature if you had a series of several position vs. clock time observations:
• If you did use observations of positions and clock times from this video, how accurately do you think you could determine the positions, and how accurately do you think you would know the clock times? Give a reasonable numerical answer to this question (e.g., positions within 1 meter, within 2 centimeters, within 3 inches, etc; clock times within 3 seconds, or within .002 seconds, or within .4 seconds, etc.). You should include an explanations of the basis for your estimate: Why did you make the estimate you did?
->->->->->->->->->->->-> answer/question/discussion: I believe with the aide of slowing the video down, accurate measurements could be given within a centimeter and clocktimes could be given within .002 seconds. The ability to use stop motion and slide the playback over the video helps an observer see when the actual object comes to the end of the ramp. The clock also moves with the slow motion.
• How can you use observations of position and clock time to determine whether the tape rolling along an incline is speeding up or slowing down?
->->->->->->->->->->->-> answer/question/discussion:
You can determine whether the tape is speeding up or slowing down while rolling along an incline by taking different time measurements at different intervals of the path. If the frequency changes then the incline must be changing.
• How can you use observations of position and clock time to determine whether the swinging pendulum is speeding up or slowing down?
You can determine whether the pendulum is speeding up or slowing down by taking different time measurements at different intervals of the path. If the frequency changes then the incline must be changing.
->->->->->->->->->->->-> answer/question/discussion:
• Challenge (University Physics students should attempt answer Challenge questions; Principles of Physics and General College Physics may do so but it is optional for these students): It is obvious that a pendulum swinging back and forth speeds up at times, and slows down at times. How could you determine, by measuring positions and clock times, at what location a swinging pendulum starts slowing down?
->->->->->->->->->->->-> answer/question/discussion:
You could determine the location a swinging pendulum begins to slow down, by dividing the arc of swing into sections and take measure the change in speed in these areas. You should see a change in momentum and be able to map the change based on the arc of swing.
• Challenge (University Physics students should attempt answer Challenge questions; Principles of Physics and General College Physics may do so but it is optional for these students): How could you use your observations to determine whether the rate at which the tape is speeding up is constant, increasing or decreasing?
->->->->->->->->->->->-> answer/question/discussion:
You can determine whether the tape is speeding up or slowing down while rolling along an incline by taking different time measurements at different intervals of the path. Frequency changes would mean that inclines would be changing.
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1 hour :-) The power went out just as I submitted the first time.
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I got them both; you did the right thing to send the second copy to be sure. This one is of course good also.