PHY 121
Your 'cq_1_06.1' 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: ->->->->->->->->->->->-> : aAve = 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, a = 20cm/s^2 v0 = 0cm/s.
Then for each situation answer the following:
• Is it possible from this information to directly determine vAve?
answer/question/discussion: ->->->->->->->->->->->-> : prob 1: yes, we know v0 and vf. Prob2: no, because `dt cannot be determined from a in this situation. prob3: no, because we would need to know something about `dt.
• Is it possible to directly determine `dv?
answer/question/discussion: ->->->->->->->->->->->-> : prob1: yes vf-v0. Prob2: yes, aAve*`dt. Prob3: no.
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15 minutes
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From here down I really am lost and need some explaination...the polygon method is very confusing to me.
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3hours...I found the 2nd methods explaination difficult to follow.
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Assignment 16
&#Very good responses. Let me know if you have questions. &#