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.
** **
The problem:
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:
10cm/s+4cm/s=14cm/s, 14cm/s/2= answer 7cm/sec
Without further information, why is this just a guess?
answer/question/discussion:
Because I just looked at the numbers and guessed. That is all the information given
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:
vavg=7cm/s, 7cm/s*3sec= answer 21cm
At what average rate did its velocity change with respect to clock time during this
interval?
answer/question/discussion:
10cm/s-4cm/s=6cm/s, 6cm/s/3sec= answer 2cm/sec
Good, but:
(6cm/s)/(3sec) needs to be grouped as indicated to clarify numerator and denominator, and the result is 2 cm/sec^2, not 2 cm/sec.
** **
30 min
** **
&#Your work looks good. See my notes. Let me know if you have any questions. &#