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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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: the average velocity of the ball is increasing.
The ball has only one average velocity on this interval.
What do you know about the behavior of the velocity on this interval?
What therefore is your best estimate of that average velocity?
• Without further information, why is this just a guess?
answer/question/discussion: this is a guess because there is not enough information in the problem to explain it to the fullest potential
Your statement would have been better had it ended with 'this is a guess because there is not enough information in the problem'. The rest of your statement contains no information.
In any case you are right that there isn't enough information in the problem. What sort of information could the statement have contained that would have given you sufficient information?
• 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: I am guess that the ball went 18cm because if you 10-4 is 6 and 6 times 3 you get 18 I am not sure if I did this correctly or not
Your answer needs to be based on the definition of velocity. What is the definition of average velocity and what does it tell you about this situation?
• At what average rate did its velocity change during this time?
answer/question/discussion: the velocity would have changed 2cm/sec
You are probably thinking correctly on this part of the question. Your answer is close but it doesn't have the correct units.
You need to include at least a concise indication of your reasoning on every answer.
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20min
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You need to show a little more detail in your reasoning on these questions. See my notes.
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