Phy 121
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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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: 6cm/sec
• 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: 30cm/sec
• By how much did its velocity therefore change?
answer/question/discussion: by 24cm/sec
• At what average rate did its velocity change with respect to clock time?
answer/question/discussion: 6cm/sec
You need to show the details of your calculations, including units at each step. Your units are not correct.
• What would a graph of its velocity vs. clock time look like? Give the best description you can.
answer/question/discussion: it would be a positive slope, slanting upward. As each increase, the line goes higher and higher.
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10 minutes
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Very good, but you have an error in at least one of your units.
&#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. &#