Phy 231
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.
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What is your best guess about the ball's average velocity?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
My guess would be (4 cm/sec + 10 cm/s)/2 = 7 cm/sec.
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Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
Because we don't know what happened in between. It could have sped up and slowed down (for example, if it was on a curved roller coaster-esque track, it would be slowing down on the curve up and speeding up on the curve down).
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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: ->->->->->->->->->->->-> scussion:
Using my best guess for average velocity, it would be 7 cm/sec * 3 seconds = 21 cm.
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At what average rate did its velocity change with respect to clock time during this interval?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
(10 cm/s - 4 cm/s)/ (3 s - 0 s) = 2 cm/s^2
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5-10 minutes
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&#Very good work. Let me know if you have questions. &#