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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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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: ->->->->->->->->->->->-> (start in the next line):
The average speed is 7 cm/sec. You would add 4+10, then divide the sum by 2.
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Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
There is nothing to go by, its just knowledge that I already know.
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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: ->->->->->->->->->->->-> (start in the next line):
It took about 2.4 cm/second to get from the first velocity to the second. I divided 7 by 3 to get this answer.
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The object appears to always be traveling faster than 4 cm/s. So in 3 seconds it would have to travel more tha 12 cm (4 cm every second for 3 seconds would imply 12 cm).
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Solution
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