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 believe the time would be the least for the steepest ramp.
** As slopes increases will time intervals increase, decrease or show no pattern? **
I would think that the time intervals would be increasing if they are lined up besides the slopes in order of greatest to least.
** Your report of 5 trials each way for 1 domino **
1.760
1.703
1.850
1.702
1.689
1.625
1.734
1.719
1.603
1.657
I set up my ramp exactly as directed to above. With one domino underneath it, I would release my ball 3cm down the ramp, making my ramp only 27cm long. The numbers above represent the amount of time it took for the ball to roll down the ramp and crash into the bracket at the end of the ramp.
** Your report of 5 trials each way for 2 dominoes **
1.251
1.281
1.297
1.203
1.197
1.258
1.375
1.171
1.214
1.158
These numbers represent how long (in seconds) it took for the ball to roll down my 27cm ramp with 2 dominoes underneath it and then crash into the bracket at the end of the ramp.
** Your report of 5 trials each way for 3 dominoes **
1.001
0.957
0.954
1.020
0.971
1.000
1.031
1.062
0.975
0.969
These numbers represent how long (in seconds) it took for the ball to roll down my 27cm ramp with 3 dominoes underneath and crash into the bracket at the end.
** Do your results support or fail to support your hypothesis about increasing or decreasing times? **
My results supported my hypotheses. The steeper the ramp, the smaller the times. So the steeper the slope of the ramp, the quicker the ball rolls down to the bottom.
** How do you think ave velocity is related to slope? **
I would say, the greater the slope relates to a greater average velocity. Since the ball begins with an initial velocity of 0 each time, the faster the final veloicty would related to a greater average velocity. So if the speed is increasing with a greater slope, so is the velocity at the bottom of the ramp. So the steeper the slope, the greater the average velocity.
** Speculate on why ave velocity changes with slope. **
As I explained above, the steeper the slope, the quicker the ball descends down the ramp. So as the speed of the ball is increasing, so it its velocity.
** How could you test your speculations? **
I could take the average time it took the ball to descend down the track in each of the trials. I could then take the length of the track (27cm) and divide that by the average time and I would obtain an average velocity of the ball down the ramp. I could then compare the average velocities between the 3 different slopes.
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It took me about 45 minutes.
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&#This looks very good. Let me know if you have any questions. &#