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.
1. What is your best guess about the ball's average velocity?
7cm/s
vAve = (v0 + vf)/2 = (4 + 10)/2 = 7cm/s
2. Without further information, why is this just a guess?
Assuming the velocity increases at a constant rate, then the average velocity should be the average of the initial & final velocities.
3. 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?
21cm
`ds = vAve`dt = (7cm/s)(3s) = 21cm
4. At what average rate did its velocity change with respect to clock time during this interval?
2 cm/s^2
a = `dv/`dt = (6cm/s)/(3s) = 2cm/s^2
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20 min.
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Please respond relative to goal of C.
&#This looks very good. Let me know if you have any questions. &#