phy 201
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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=45 cm
• 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 ’d= 3 sec 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=30 cm 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: ->->->->->->->->->->->-> : You cannot directly find the average velocity using the values given, you need a time interval. You can find the time interval using the info given, but you cannot use these values to directly determine average velocity.
• Is it possible to directly determine `dv?
answer/question/discussion: ->->->->->->->->->->->-> : You cannot directly find the change in velocity using the values given, you need a final velocity. You can find the final velocity using the info given, but you cannot use these values to directly determine the change in velocity.
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40 minutes
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&#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. &#