Phy 231
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: ->->->->->->->->->->->-> (start in the next line):
Average velocity = change in position / change in time = 30 cm / 5 s = 6 cm/s.
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• 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: ->->->->->->->->->->->-> (start in the next line):
The average velocity is the average if the initial and final velocities, so the final is the average*2 = 6 cm/s *2 = 12 cm/s.
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• By how much did its velocity therefore change?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The velocity change by 12 cm/s because the object started at 0 cm/s.
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• At what average rate did its velocity change with respect to clock time?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
Average rate of change of velocity = change in velocity / clock time = 12 cm/s / 5 s = 2.4 cm/s^2.
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• What would a graph of its velocity vs. clock time look like? Give the best description you can.
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The graph of velocity versus clock time would look like a straight, increasing line with a constant slope of 2.4.
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10 minutes
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6/8 2:30
&#This looks good. Let me know if you have any questions. &#