Your 'ball down ramp' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** Your general comment **
** Will a steeper ramp give greater or lesser time? **
The time required to roll the length of the ramp will be least for the steepest ramp.
** As slopes increases will time intervals increase, decrease or show no pattern? **
Time intervals should be increasing.
** Your report of 5 trials each way for 1 domino **
1.234
1.188
1.234
1.203
1.196
1.325
1.297
1.301
1.223
1.341
The first five lines indicated the measurements on the right side of the ramp with one domino. The sixth through tenth lines indicate the left side of the ramp. These measurements were taken from when the ball was let go until the ball hit the bracket at the bottom. In this experiment there was only one domino under the ramp.
** Your report of 5 trials each way for 2 dominoes **
During the practice trials, I was thinking about the ramp being at a very small incline, and the ball taking a while to reach the bracket.
.906
.984
.922
.953
.907
.937
.953
.984
.925
.939
The first five numbers represent the amount of time it took the ball to reach the bracket when two dominos were placed under the right side of the ramp. The sixth through tenth numbers represent the amount of time it took the ball to reach the bracket when two dominos were placed under the left side of the ramp.
** Your report of 5 trials each way for 3 dominoes **
.797
.772
.765
.750
.781
.765
.771
.749
.766
.716
** Do your results support or fail to support your hypothesis about increasing or decreasing times? **
From these results I accept the hypothesis. The greater the slope the shorter the time interval. The smaller the slope the longer the time interval.
** How do you think ave velocity is related to slope? **
The average velocity is the distance traveled / the time elapsed. Since the only changing value is the time elapsed, the greater the slope the shorter the time frame from the release of the ball until it hit the bracket.
** Speculate on why ave velocity changes with slope. **
The speed of the ball caused the average velocity to change with slope. The greater the slope the faster the ball rolls down the ramp.
** How could you test your speculations? **
You could very easily find the average velocity and compare it with the changing slope.
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45 minutes
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The variations in your measurements have to be taken into account when accepting the hypothesis. If the means and standard deviations were all calculated and the intervals compared, as in the original hypothesis testing experiment, the two intervals would be separate and the hypothesis would be accepted.