Phy 121
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?
answer/question/discussion: 7 cm/ sec
• Without further information, why is this just a guess?
answer/question/discussion:because you don’t know if the ball changed velocity during this time and you don’t know if the ball started fast and slowed down or started slow and sped up.
• 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?
answer/question/discussion:12 cm
this would be the distance if the velocity didn't change
• At what average rate did its velocity change with respect to clock time during this interval?
answer/question/discussion: 2 cm/sec
good but you have a units error here.
You should also indicate how you got your result (e.g., `dv / `dt = 6 cm/s / (3 s) = 2 cm/s^2)
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About 15 min.
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&#At least part of your solution does not agree with the solution and comments given at the link below. You should view the solution at that link and self-critique as indicated there.
Solution
This link also expands on these topics and alerts you to many of the common errors made by students in the first part of this course. &#