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 the interval for the steepest ramp will be the smallest.
** As slopes increases will time intervals increase, decrease or show no pattern? **
The time intervals will be decreasing with a clear pattern.
** Your report of 5 trials each way for 1 domino **
2.043
2.074
2.090
2.074
2.090
1.234
1.203
1.250
1.234
1.188
The ball rolled 28.0cm. I placed the domino at the 28cm mark on the plank and put the ball behind it. When i released the ball by moving the domino I clikced the timer and again after it hit the bracket. I then recorded the time intervals. The first 5 are the time intervals in seconds it took the ball to roll 28cm with a slope of 1 domino. The second 5 are the seconds it took to roll 28cm with a slope of 2 dominoes.
** Your report of 5 trials each way for 2 dominoes **
I was concentrating on clicking the button at the right moments.
1.219
1.234
1.219
1.258
1.219
1.367
1.328
1.429
1.328
1.352
The first 5 numbers are the times it took for the ball to roll 28cm when 2 dominoes were placed on the right hand side. The second 5 numbers are the time intervals for when 2 dominoes were placed under the left hand side.
** Your report of 5 trials each way for 3 dominoes **
0.961
0.953
0.984
0.953
0.922
1.070
1.078
1.008
1.031
1.078
The first 5 numbers represent the time intervals for the ball rolling down a ramp with three dominoes on the right hand side. The ball rolls 28cm. The second 5 numbers represent the intervals for the ball rolling 28cm with three dominoes on the left hand side of the ramp.
** Do your results support or fail to support your hypothesis about increasing or decreasing times? **
Yes. As my slopes increased(more dominoes were added) the time intervals decreased.
** How do you think ave velocity is related to slope? **
I think that velocity is directly related to the slope of the ramp. As the slope increased, the velocity increases. I think the rate of increase is constant.
** Speculate on why ave velocity changes with slope. **
The higher the ball is raised, the more potential energy it has. As it rolls down the ramp, the PE is converted to KE which is directly related to the velocity. More PE leads to more KE which is directly related to velocity.
** How could you test your speculations? **
You could measure the PE of the system by finding mgh. Then make this potential energy loss equal to KE. Then you could solve for velocity. I am sure that those with less PE will have less velocity.
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30 mins
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&#Very good responses. Let me know if you have questions. &#