Phy231
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: ->->->->->->->->->->->-> :
vf,v0, and 'ds are given
vf=20cm/s v0=10cm/s 'ds=45cm
(20cm/s + 10cm/s)/2= 15cm/s=vAve
45cm=15cm/s*'dt 'dt=3s
15cm/s /3s=5cm/s^2 is the a
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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=3sec vf=50cm/s
10cm/s^2*3sec=30cm/s='dv
v0+'dv=vf v0+30cm/s=50cm/s v0=20cm/s
(50cm/s +20cm/s)/2= 35cm/s =vAve
vAve*'dt='ds 35cm/s*3s=105cm ='ds
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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: ->->->->->->->->->->->-> :
30cm='ds v0=0cm/s a=20cm/s^2
I'm really having a hard time to figure out the rest of them with these numbers.
You have to use the appropriate equations of motion to solve this case.
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Then for each situation answer the following:
Is it possible from this information to directly determine vAve?
answer/question/discussion: ->->->->->->->->->->->-> :
Only the first problem directly
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Is it possible to directly determine `dv?
answer/question/discussion: ->->->->->->->->->->->-> :
ONce again with the first one you can figure it out
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35min
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2/26/10 11am
&#Good responses. See my notes and let me know if you have questions. &#