PHY201
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 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.
answer/question/discussion:
Avg velocity = (initial velocity+ final velocity)/2
You know its average velocity, and you know the initial velocity is zero. What therefore must be the final velocity?
answer/question/discussion:
Final velocity = (6cm/s *2) - 0
Final velocity = 12cm/s
By how much did its velocity therefore change?
answer/question/discussion:
12cm/s - 0cm/s = 12cm/s
At what average rate did its velocity change with respect to clock time?
answer/question/discussion:
12cm/s / 5s = 2.4cm/s/s
What would a graph of its velocity vs. clock time look like? Give the best description you can.
answer/question/discussion:
It would show a linear increase from 0,0 to 12,5 which would be a straight line with a poisitive slope between these points.
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30 minutes
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Excellent work.