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?
It's average velocity is 6cm/s.
->->->->->->->->->->->-> answer/question/discussion:
• 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?
Since its initial velocity is 0, and it's average velocity is 6cm/s. Its final velocity must be 12cm/s. This is because the average of 12 and 0 is 6.
->->->->->->->->->->->-> answer/question/discussion:
• By how much did its velocity therefore change?
It's velocity changed by 12cm/s.
->->->->->->->->->->->-> answer/question/discussion:
• At what average rate did its velocity change with respect to clock time?
The rate that the velocity changed is 2.4cm/s/s.
->->->->->->->->->->->-> answer/question/discussion:
• What would a graph of its velocity vs. clock time look like? Give the best description you can.
It would start at the origin, then move upwards with a slope of 2.4 to the point (5,12). It would be a linear graph because the velocity increased at a constant rate.
->->->->->->->->->->->-> answer/question/discussion
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30 min
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&#Very good work. Let me know if you have questions. &#