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course phy 231
i only have one of the 15 cm ramps instead of the 30 cm ramp, is it okay to use that for these experiments instead?
For now, use what you have. But get by an pick up a 30 cm ramp. You will need both for some later experiments.
Brief ball off ramp to flooruses ball, ramp, TIMER, domino
See also Pictures_of_ball_and_ramps, which includes pictures and brief descriptions of basic setups.
Set up the ramp with one end supported by a domino lying on its long edge.
Time the ball traveling down the ramp, from rest, from release until it reaches the end of the ramp. Then time the ball from release until, having traveled down the ramp and fallen off the edge, it reaches the floor. Use your 8-count to determine the most accurate possible results.
At the same time you should be taking steps to observe how far the ball traveled in the horizontal direction after leaving the edge of the ramp.
Report your data:
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I only have the half size ramp, the one that is 15 cm long instead of 30. Is this okay?
From rest to end of ramp: 5 counts
From rest to the floor: 9 counts
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Then repeat, using the TIMER.
Report your data:
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From rest to end of ramp: .65 seconds
From rest to the floor: 1.0 seconds
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Repeat once more, this time clicking the TIMER at the ball's release, at the end of the ramp, and upon striking the floor.
Report your data:
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From release to end of ramp: .61
From release to floor: 1.01
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Describe the steps you took to get the most accurate possible data, and report your data.
I did multiple trials with each scenario and I took the average time that I got, if my times were consistent. I tried to not anticipate my clicking, so I tried to let go of the ball and click at the same time, click when I heard and saw the ball roll off the table, and click again when I heard it thud the ground. My final trial where I clicked three different times was consistent with my other trials, so that gives me confidence in my results
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Analysis:
Be sure to include at least one sample calculation for each question (for example, when asked to find the acceleration for three setups, indicate how you did one of the calculuations, then just give your results for the other two).
For each setup, according to your 8-counts, what was the time in seconds for the ball to travel from one end of the ramp to the other? Explain your calculations, and give your results.
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What were the resulting average velocities?
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What were the resulting average accelerations, assuming acceleration to have been uniform?
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For each setup what was the time according to the TIMER program?
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What were the resulting average velocities?
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What were the resulting average accelerations, assuming acceleration to have been uniform?
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Describe how it might be possible for someone to 'think' him- or herself into errors on the 8-count.
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Describe how it might be possible for someone to 'think' him- or herself into errors using the TIMER.
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What do you estimate to be your percent error on the 8-count?
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Good data. See appended instructions for analysis.
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