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.
** **
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: ->->->->->->->->->->->-> : 10 + 4 / 2 = 7cm/s vAve.
Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> :A guess because the typical way to get an average is to add the items and divide by the number of items added.
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: ->->->->->->->->->->->-> : 21 cm, obtained by multiplying the width of the area under the trapezoid (3) by the average height/velocity.
21 cm or.21 meters
At what average rate did its velocity change with respect to clock time during this interval?
answer/question/discussion: ->->->->->->->->->->->-> :
2cm/s, obtained by getting the slope of a v vs t graph.
your units aren't right, but otherwise you did the right things
** **
20 minutes.
** **
No revision is necessary, but check out the link, especially as it relates to the units:
&#Please compare your solutions with the expanded discussion at the link
Solution
Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified. &#