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? **
time required will be least for the steepest ramp.
** As slopes increases will time intervals increase, decrease or show no pattern? **
As slopes increase, time intervals should decrease.
** Your report of 5 trials each way for 1 domino **
0.781
0.875
0.859
0.781
0.812
0.703
0.765
0.750
0.750
0.765
Using a ramp that was 12.05 cm long, and two dominos stacked at the left end for one trial, and the right end for the next trial. A bracket was placed at the end to stop the ball. The timer was started upon release and stopped when the ball hit the bracket. This is the time it took for the ball to roll down a ramp 12.05 cm long at an incline of two dominoes.
** Your report of 5 trials each way for 2 dominoes **
0.750
0.750
0.765
0.750
0.765
0.734
0.718
0.718
0.687
0.656
0.656
0.687
0.718
0.734
Using the same procedure outline above, I used a ramp that was 12.05 cm long, and two dominos stacked at the left end for one trial, and the right end for the next trial. A bracket was placed at the end to stop the ball. The timer was started upon release and stopped when the ball hit the bracket. This is the time it took for the ball to roll down a ramp 12.05 cm long at an incline of two dominoes.
** Your report of 5 trials each way for 3 dominoes **
.439
.447
.451
.453
.435
.421
.432
.467
.453
.445
.428
** Do your results support or fail to support your hypothesis about increasing or decreasing times? **
My results supported my hypothesis that as slope increases, the time interval it takes for the ball to roll down the incline will decrease. This is supported by the decreased time intervals reported for the higher incline.
** How do you think ave velocity is related to slope? **
As the slope of a ramp increases, The average velocity of a ramp will also increase.
** Speculate on why ave velocity changes with slope. **
Potentially as the slope increases, potential energy increases.
** How could you test your speculations? **
Is there some way to measure potential energy? Repeat the experiment recording actual slope of the incline vs. time required to travel down the ramp.
The potential energy loss is proportional to the vertical drop. For small slopes the frictional loss is pretty much proportional to the distance traveled, and is nearly the same for all trials. The kinetic energy gain is equal to the PE loss minus the frictional loss. Kinetic energy is proportional to the squared velocity (specifically KE = 1/2 m v^2).
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35 min
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&#This looks good. See my notes. Let me know if you have any questions. &#