phy 201
Your 'cq_1_03.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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The problem:
A ball starts with velocity 0 and accelerates uniformly down a ramp of length 30 cm, covering the distance in 5 seconds.
• What is its average velocity?
answer/question/discussion: 30cm/5s=6cm/s
• If the acceleration of the ball is uniform then its average velocity is equal to the average of its initial and final velocities.
You know its average velocity, and you know the initial velocity is zero.
What therefore must be the final velocity?
answer/question/discussion: 12+0=12/2=6 so the final velocity would be 12 cm/s
• By how much did its velocity therefore change?
answer/question/discussion: 12cm/s
• At what average rate did its velocity change with respect to clock time?
answer/question/discussion: 12cm/s/5s=2.4
• What would a graph of its velocity vs. clock time look like? Give the best description you can.
answer/question/discussion: Slope would be positive, and it would be a straight line
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about 10 minutes
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I'm still having some problems with the units, I think. Not sure how to get units for average rate of change in velocity...
&#See the link below for a complete discussion of this problem. There is no need to submit a revision unless you have questions or wish to submit an alternative solution. &#
&#At least part of your solution does not agree with the solution and comments given at the link below. You should view the solution at that link and self-critique as indicated there.
Solution
This link also expands on these topics and alerts you to many of the common errors made by students in the first part of this course. &#