#$&*
Phy 121
Your 'cq_1_02.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** CQ_1_02.1_labelMessages.txt **
The problem:
A ball starts with velocity 4 cm/sec and ends with a velocity of 10 cm/sec.
What is your best guess about the ball's average velocity?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
I would guess vAve= 7 cm/sec, as 4cm/sec + 10 cm/sec = (14cm/sec) / 2 = 7 cm /sec
#$&*
Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
Because to know the actual average velocity, you need to know the starting and ending displacement along with the corresponding
time intervals.
#$&*
If it takes 3 seconds to get from the first velocity to the second, then what is your best guess about how far it traveled during that time?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
Using my best guess vAve, 7 cm/s * 3 sec = 21 cm
#$&*
At what average rate did its velocity change with respect to clock time during this interval?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
aAve = 'dv / 'dt, so (10cm/sec - 4cm/sec) / 3 sec = (6 cm/sec) / 3 sec = 2 cm/sec /sec
#$&*
*#&!
&#Very good responses. Let me know if you have questions. &#