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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):
30 / 5 = 6 cm/sec
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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):
6 cm/sec
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By how much did its velocity therefore change?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
6 cm/sec
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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):
6 cm/sec / 5 sec = 1.2 cm/sec
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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 would start at point 0,0 and move to a point of (5 sec,6 cm/sec). The line
between these two points would be straight and the slope would be 1.2 (cm/sec)/sec.
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*#&!
@& You indicate that the final velocity is equal to the average velocity.
The object starts from rest. If its final velocity is 6 cm/s then its average velocity would be 3 cm/s. This contradicts your original calculation of the average velocity.*@
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