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PHY 241
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: ->->->->->->->->->->->-> :
You can find ‘dt. It would take 0.33 s to travel the 45cm.
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@& You have the reciprocal of the time interval. Careful use of units would have avoided this error.*@
• 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: ->->->->->->->->->->->-> :
You can find v0. It would be 20cm/s.
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• A ball travels 30 cm along an incline, starting from rest, while accelerating at 20 cm/s^2.
answer/question/discussion: ->->->->->->->->->->->-> :
I am unable to determine what quantity can be found. I can see ‘ds is 30 cm and a is 20cm/s^2, but I am unable to connect them with an equation.
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@& You also know that v0 = 0. The object accelerates from rest.*@
Then for each situation answer the following:
• Is it possible from this information to directly determine vAve?
answer/question/discussion: ->->->->->->->->->->->-> :
No
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• Is it possible to directly determine `dv?
answer/question/discussion: ->->->->->->->->->->->-> :
No
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@& 'yes' and 'no' answers always require the support of your reasoning.*@
*#&!
@& You obviously know what you are doing, but see my notes.
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