Phy 201
Your 'cq_1_6.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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For each situation state which of the five quantities v0, vf, `ds, `dt and a are given, and give the value of each.
• A ball accelerates uniformly from 10 cm/s to 20 cm/s while traveling 45 cm.
answer/question/discussion: v0 = 10cm/s, vf = 20cm/s, ‘ds = 45cm
• A ball accelerates uniformly at 10 cm/s^2 for 3 seconds, and at the end of this interval is moving at 50 cm/s.
answer/question/discussion: a = 10cm/s^2, ‘dt = 3s, vf = 50cm/s
• A ball travels 30 cm along an incline, starting from rest, while accelerating at 20 cm/s^2.
answer/question/discussion: ‘ds = 30cm, v0 = 0, a= 20cm/s^2
Then for each situation answer the following:
• Is it possible from this information to directly determine vAve?
answer/question/discussion: yes if you have the initial velocity and the final velocity you can get the average velocity just add the initial and final velocities and divide by 2.
In this situation you aren't given initial and final velocities.
• Is it possible to directly determine `dv?
answer/question/discussion: yes if you have your initial and final velocities you can subtract the two to get your change in velocities. Just subtract the final from the initial.
In this situation you aren't given initial and final velocities.
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20min
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You assumed initial and final velocities in your last two answers; however these quantities aren't given.
At least part of your solution does not agree with the solution and comments given at the link below. You should view the solution at that link and self-critique as indicated there.
Solution
This link also expands on these topics and alerts you to many of the common errors made by students in the first part of this course.