#$&*
course Phy 241
9/23 6:42
The problem:A ball starts with velocity 4 cm/sec and ends with a velocity of 10 cm/sec.
What is your best guess about the ball's average velocity?
answer/question/discussion (start in the next line):
7cm/s
#$&*
Without further information, why is this just a guess?
answer/question/discussion (start in the next line):
we dont know how much time went by during the change
#$&*
If it takes 3 seconds to get from the first velocity to the second, then what is your best guess about how far it traveled during that time?
answer/question/discussion (start in the next line):
10cm/s - 4cm/s = 6cm/s * 3s = 18cm
#$&*
@& You don't get an average velocity by subtracting initial from final velocity.*@
At what average rate did its velocity change with respect to clock time during this interval?
answer/question/discussion (start in the next line):
final velocity - initial velocity / time = 10cm/s - 4cm/s / 3s = 6cm/s/3s = 2cm/s^2
#$&*
"
@& You had one error, so be sure to see my note.
Also be sure you submit 'seed' each problem using the form for that problem. No big deal if you forget a few times, but overall it keeps records straight if you use the form.*@