PHY 121
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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Which object did you choose and what were the three positions and the three clock times?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
#$&*I chose the pendulum the clock times were 39.375 and the pendulum was at the start position. Second frame the clock time was 40.906 and the pendulum was halfway down the tape approx. 12inch. The third frame clock is at 41. 562 the pendulum is at approx. 19 inches. #$&*
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: ->->->->->->->->->->->-> (start in the next line):
#$&* If I had to use the positions and clock times from this video I believe I would be within an inch accurate with distance. As far as time I would be within 5 seconds accurate seeing that the time was already moving before the object started to move. Trying to time the object at the same time the clock was going is kinda difficult to get an accurate time.#$&*
• 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: ->->->->->->->->->->->-> (start in the next line):
#$&* you can start and stop the video at three different times and calculate the distance it moved in each frame. Therefore you can see if it was moving faster in each frame. #$&*
• How can you use observations of position and clock time to determine whether the swinging pendulum is speeding up or slowing down?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
#$&* by using the method mentioned before you can start and stop the video at three different times and calculate the distance it moved in each frame. Therefore you can see if it was moving faster in each frame#$&*
• 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: ->->->->->->->->->->->-> (start in the next line):
#$&*
• Challenge (University Physics students should attempt answer Challenge questions; Principles of Physics and General College Physics may do so but it is optional for these students): How could you use your observations to determine whether the rate at which the tape is speeding up is constant, increasing or decreasing?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
#$&*
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about 20 minutes
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&#Good responses. Let me know if you have questions. &#
&#Your work is mostly correct, and I believe you will understand everything after reading the document in the link below. You will be directed to submit a revision; however unless you have questions or comments, the revision is not necessary. Just be sure you understand all the important details in the document. &#