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 do not know for how long it was at what speed
• 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:21 cm
• At what average rate did its velocity change with respect to clock time during this interval?
answer/question/discussion:6 cm./ sec
What is the definition of the average rate of change of velocity with respect to clock time, and how does that definition applied to the current situation?
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5 min.
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Your first three answers are correct. The last is not; you didn't include your reasoning with the steps of your solution, so I can't tell for sure what you did wrong.
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