Phy 231
Your 'cq_1_02.1' 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 4 cm/sec and ends with a velocity of 10 cm/sec.
• What is your best guess about the ball's average velocity?
My guess of the average velocity would be 7 cm/sec since it is right in the middle of 10 and 4.
->->->->->->->->->->->-> answer/question/discussion:
• Without further information, why is this just a guess?
This is just a guess because we don't have enough information to solve the problem. We must know for how long the ball was rolling with each velocity. We cannot say that the average was 7cm/s because the time at each velocity matters a lot.
->->->->->->->->->->->-> answer/question/discussion:
• If it takes 3 seconds to get from the first velocity to the second, then what is your best guess about how far it traveled during that time?
It would travel 18cm in 3 seconds. This was calculated by finding the change in velocity and multiplying that answer by 3 seconds.
->->->->->->->->->->->-> answer/question/discussion:
• At what average rate did its velocity change with respect to clock time during this interval?
The velocity changed at 2 m/s/s. This is found by dividing the change in velocity by the time interval.
->->->->->->->->->->->-> answer/question/discussion:
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30 min
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&#Your work looks good. Let me know if you have any questions. &#