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:
7 cm/s because that is the average of the two points.
Without further information, why is this just a guess?
answer/question/discussion:
The average of the two points is an estimate or guess because not enough information is given to calculate the actual average velocity.
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:
2.3cm because it traveled at an average velocity of 7cm/s for 3 sec.
If something moves at 7 cm/s for 3 s it moves further than 2.3 cm. It moves further than 2.3 cm in one second.
At what average rate did its velocity change with respect to clock time during this interval?
answer/question/discussion:
2cm/s/s because 10-4=6, 6/3=2
Good.
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25 minutes
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One of your answers was incorrect. Be sure you understand my note, as I believe you will. Send me your reasoning, including the initial information, if you aren't sure you can get the correct displacement.