#$&*
PHY 201
Your 'cq_1_02.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** CQ_1_02.1_labelMessages.txt **
Samantha Rogers
PHY 201
Seed 2.1
The problem:
A ball starts with velocity 4 cm/sec and ends with a velocity of 10 cm/sec.
• What is your best guess about the ball's average velocity?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):My guess would be that the ball has an average velocity of 7cm/sec. (10 cm/sec + 4 cm/sec) / 2 = 7 cm/sec.
#$&*
• Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
Although this is the average of the two velocities given, this doesn't mean that it is the average velocity. It is very possible that while the ball is traveling that it slowed down and then quickly speed up or the other way around.
#$&*
• If it takes 3 seconds to get from the first velocity to the second, then what is your best guess about how far it traveled during that time?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
vAve = `ds / `dt
`ds = vAve * `dt
(using my estimated guess)
`ds = (7 cm/sec) * 3 sec
`ds = 21cm
#$&*
• 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
change in velocity = 10 cm/s - 4 cm/sec = 6 cm/s
aAve = 6cm/sec / 3sec
aAve = 2cm/sec^2
#$&*
*#&!
&#Your work looks very good. Let me know if you have any questions. &#