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Phy 231
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.
** CQ_1_06.1_labelMessages **
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: ->->->->->->->->->->->-> scussion:
Given:
v0=10cm/s
vf=20cm/s
`ds=45cm
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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: ->->->->->->->->->->->-> scussion:
Given:
a=10cm/s^2
`dt=3s
vf=50cm/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: ->->->->->->->->->->->-> scussion:
Given:
`ds=30cm
v0=0cm/s
a=20cm/s^2
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Then for each situation answer the following:
Is it possible from this information to directly determine vAve?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
First situation: Yes, it is possible to directly determine vAve. Simply find the average of v0 and vf, easily calculated by finding their sum and dividing by 2, or by figuring out the halfway point between the two.
Second situation: No, it is not possible to directly determine vAve in one step, but we can find it with an intermediate step. Acceleration is the rate of change in velocity with respect to time, or a=(vf-v0)/`dt. We can rearrange this and solve for the value of v0, initial velocity. From there we can use the method from the first sutation.
Third situation: No, it is not possible to directly determine vAve in one step from this information. We would actually need to combine two equations.
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&#Very good responses. Let me know if you have questions. &#