Phy 201
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? **
I think that the time required to roll the length of the steepest ramp will be the least.
** As slopes increases will time intervals increase, decrease or show no pattern? **
I think the one with the greatest slope will take less time but it will be barely measurable so from the least to greatest it would be decreasing.
** Your report of 5 trials each way for 1 domino **
1.45
1.39
1.57
1.36
1.40
1.50
1.02
1.02
1.23
1.30
I used 2 quarters and a 15cm ramp and rolled a large marble down the ramp 5 times on the right hand side then 5 times on the left hand side i used the timer program to record the time it took from release of the marble until it hit my bracket.
** Your report of 5 trials each way for 2 dominoes **
.832
.901
.809
.840
.855
.867
.816
.704
.852
.832
I used 4 quarters and a 15cm ramp this time and the first five numbers are the times recorded from the right side of the ramp and the last five numbers are the times recorded from the left side of the ramp. all of the numbers were recorded using the timer program from the release of the ball until it hit the bracket.
** Your report of 5 trials each way for 3 dominoes **
.727
.657
.707
.655
.617
.707
.695
.622
.601
.617
This time i used six quarters and the 15cm ramp. the first five numbers are the measurements of time from start to stop on the right side of the ramp the last five numbers are the measurements from start to stop on the left hand side of the ramp.
** Do your results support or fail to support your hypothesis about increasing or decreasing times? **
my results support my hypotheses. because the greater the slope the shorter the time interval it takes for the ball to go from the start to the finish. greater the slope the greater the acceleration and the less time it takes.
** How do you think ave velocity is related to slope? **
the average velocity is represented as slope between two points on a graph of position vs clock time. so the the starting position of the ball is one point and the final position is the other. the change in position between two clock times is represented as an area beneath a graph of velocity vs clock time. it would be displacement/ time in this case because acceleration is not uniform
** Speculate on why ave velocity changes with slope. **
the average velocity changes because of the acceleration. the acceleration is not uniform on the different slopes
The acceleration on each ramp is expected to be uniform, so on every measuerd interval we have uniform acceleration.
However if three such ramps were set up so that the ball could roll consecutively from one to the other, the acceleration over the interval from the first to the last ramp would not be uniform.
** How could you test your speculations? **
according to my results the ball must be speeding up with the slope increasing so i think the point has been validated.
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45min
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&#Good responses. See my notes and let me know if you have questions. &#