#$&*
Phy 201
Your 'cq_1_02.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** CQ_1_02.1_labelMessages.txt **
The problem:
A ball starts with velocity 4 cm/sec and ends with a velocity of 10 cm/sec.
• What is your best guess about the ball's average velocity?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
7cm/sec because it is in the middle of the two velocities.
#$&*
• Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
We don’t know what was happening in between the start and ending velocity, we don’t have any other numbers to work with.
#$&*
• If it takes 3 seconds to get from the first velocity to the second, then what is your best guess about how far it traveled during that time?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
an average of 7 * 3 =21cm
#$&*
• At what average rate did its velocity change with respect to clock time during this interval?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
10 - 4 = 6
6 / 3 = 2
I think it accelerated at 2cm/s
#$&*
@&
You need to use units at every step of your calculation, and also identify your quantities.
Your calculation would read
10 cm/s - 4 cm/s = 6 cm/s = `dv, change in velocity
6 cm/s / 3 s = 2 cm/s^2, which is `dv/`dt
This is the requested average rate.
*@
*#&!
&#Good work. See my notes and let me know if you have questions. &#