PHY 121
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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= 10 cm/s
vf= 20 cm/s
`ds= 45 cm
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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= 10 cm/s^2
dt= 3 seconds
vf= 50 cm/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: ->->->->->->->->->->->-> :
ds= 30 cm
a= 20 cm/s^2
v0=0
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Then for each situation answer the following:
• Is it possible from this information to directly determine vAve?
answer/question/discussion: ->->->->->->->->->->->-> :
1- yes
2- no
3- no
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• Is it possible to directly determine `dv?
answer/question/discussion: ->->->->->->->->->->->-> :
1- yes
2- no
3- yes
#$&*
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30 min
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&#Very good responses. Let me know if you have questions. &#
No need for revision; the link below is provided simply to make the discussion available to you:
&#Please compare your solutions with the expanded discussion at the link
Solution
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