PHY 231
Your 'cq_1_03.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** **
The problem:
A ball starts with velocity 0 and accelerates uniformly down a ramp of length 30 cm, covering the distance in 5 seconds.
• What is its average velocity?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
30 cm / 5 seconds = 6 cm / second
The average velocity is 6 cm / second.
#$&*
• If the acceleration of the ball is uniform then its average velocity is equal to the average of its initial and final velocities.
You know its average velocity, and you know the initial velocity is zero.
What therefore must be the final velocity?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
Therefore, the final velocity must be 12 cm/ second.
0 cm / second + 12 cm / second = 6 cm / second average
#$&*
• By how much did its velocity therefore change?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
Its velocity therefore changed 12 cm / second total. ( 12 - 0 = 12 )
#$&*
• At what average rate did its velocity change with respect to clock time?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The average rate the velocity changed was 2.4 cm/ second ( 12 / 5 = 2.4 ).
This answer is incorrect. Be sure you compare with the link provided at the end of this document.
#$&*
• What would a graph of its velocity vs. clock time look like? Give the best description you can.
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The graph would have a positive, increasing constant slope of 2.4 cm/s for every clock second. It's origin and minimum would be at 0, 0. The maximum would be 12, 5.
#$&*
________________________________________
Copy and paste your work into the box below and submit as indicated:
** **
15 Minutes
** **
Good, but see my notes and check the link.
&#See any notes I might have inserted into your document. If there are no notes, this does not mean that your solution is completely correct.
Then 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.If your solution is completely consistent with the given solution, you need do nothing further with this problem. &#