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Phy 121
Your 'cq_1_05.1' 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_05.1_labelMessages **
The problem:
A ball accelerates at 8 cm/s^2 for 3 seconds, starting with velocity 12 cm/s.
What will be its velocity after the 3 seconds has elapsed?
answer/question/discussion: ->->->->->->->->->->->-> :
aAve='dv/dt
8 cm/s^2=(vf-12cm/s) / 3s
(vf-12cm/s)= 8 cm/s^2*3s=
(vf-12cm/s)= 24 cm/s
vf=24cm/s+12cm/s
vf=36cm/s
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Assuming that acceleration is constant, what will be its average velocity during this interval?
answer/question/discussion: ->->->->->->->->->->->-> :
vAVe=(vf+v0)/2
12cm/s+36cm/s= 48cm/s
vAve= (48cm/s) / 2
vAve=24 cm/s
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How far will it travel during this interval?
answer/question/discussion: ->->->->->->->->->->->-> :
'ds= vAve*'dt=
24 cm/s * 3s
= 72 cm
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*#&!
&#Very good work. Let me know if you have questions. &#