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course Phy 121
Tues. 8/27/13 Around 11:51 A.M.
After completing the A1 and A2 steps in the document I just sent you (which doesn't appear to be showing up, so I'm going to send it again as soon as I finish this message), you will know how to complete the steps below. You should submit this in the same manner as those documents, using the Submit Work Form at http://vhcc2.vhcc.edu/dsmith/submit_work.htm Insert your answer following the colon (:) after each prompt. Extensive answers aren't required, but th last few questions could each use a good sentence or two.
1. Pendulum data
Give your two pendulum counts and lengths. Lengths should be measured with the paper ruler you used in class.
length of first pendulum: 52 cm one-minute count for first pendulum: 40
length of second pendulum: 28 cm one-minute count for second pendulum: 56
2. Number of cycles required for ball to roll down ramp:
first trial (ramp supported on west side of tabletop, wide end of ramp directed to west): 3
second trial (ramp supported on west side of tabletop, wide end of ramp directed to east): 3
third trial (ramp supported on east side of tabletop, wide end of ramp directed to west): 2.5
fourth trial (ramp supported on east side of tabletop, wide end of ramp directed to east): 2.5
3. The tabletop is almost certainly not level. According you your information, do you think it is tilted toward the east or toward the west?
West
How is your answer related to your data, and with how much certainty do you think your conclusion is supported by your data?
Whichever end of the table is lower, the ball would roll to that end faster. The faster the ball rolls, the less time it takes for the pendulum to swing.
Fairly certain. There, of course, is always the possibility for error, but I do not believe that their was much error in my observations
How do you think we could get data to test this question with more certainty?
We could use better tools for measuring. (Ex. an electronic timer instead of a pendulum)
We could also measure precisely how far up the ramp to put the ball each time instead of just eyeballing it each time."
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Good. Thanks.
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