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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The problem:
You don't have to actually do so, but it should be clear that if you wished to do so, you could take a number of observations of positions and clock times. The point here is to think about how you would use that information if you did go to the trouble of collecting it.
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If you did take observations of positions and clock times, how accurately do you think you could determine the positions, and how accurately do you think you would know the clock times?
answer/question/discussion:
The time it takes for both objects to pass this distance, which I beleive is almost 1ft 10in that takes less
2 seconds to complete. I don't believe you can be but so accurate, but what is accuracy? If you took the
time to take 20 to 50 data points, watching the movie over and over again pausing and playing the video you
could come to some reasonable results. I believe within an 1/2 inch and a tenth of a second.
How can you use observations to determine whether the tape rolling along an incline is speeding up or slowing down?
answer/question/discussion:
You could determine the time it takes for the tape to roll the first half of the incline, and then figure
out how long it takes to complete the second half. Compare those two times and then see which time is less,
if the second half (at the bottom of the incline) of the incline is less then the tape is therefore speeding up.
How can you use your observations to determine whether the swinging pendulum is speeding up or slowing down?
answer/question/discussion:
I believe you can determine this by the same way you did the rolling tape. As before, figure out how
long it takes the pendelum to get halfway down the incline, and then the time it takes to finish the other half.
Compare those two times, if the two times are the same the pendulum is remaining the same speed throughout.
If the first half is faster than the second, then its slowing down. So forth...
First, we know the rolling tape is moving faster than the swinging pendulum. But we don't the exact speed of the pendulum, it could be moving at the same speed the entire time. It seems to be slower because the rolling tape looks to be moving so much faster.
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:
I believe I kinda answered that earlier, you've got to split the interval in half, and determine what part of the race is the object moving faster. If it's the second half it's speeding up, if its the first half then their slowing down.
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:
My same answer.
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1 hour and half
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Good answers. No need to submit, but to anticipate future questions, think about what you could find from a series of several data points that you can't find from just three data points corresponding to start, middle and end.