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phy 201
Your 'cq_1_07.1' 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_07.1_labelMessages **
A ball falls freely from rest at a height of 2 meters. Observations indicate that the ball reaches the ground in .64 seconds.
• Based on this information what is its acceleration?
answer/question/discussion: ->->->->->->->->->->->-> :
vAve=ds/dt
vAve=2/.64=3.125
vf=vAve*2
vf=3.125*2=6.25
aAve=vf/dt
aAve=6.25/.64=9.76
aAve=9.8
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• Is this consistent with an observation which concludes that a ball dropped from a height of 5 meters reaches the ground in 1.05 seconds?
answer/question/discussion: ->->->->->->->->->->->-> :
vAve=5/1.05=4.76
vf=4.76*2=9.52
aAve=9.52/1.05=9.07
aAve=9.1
This is not consistent with the previous equation.
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• Are these observations consistent with the accepted value of the acceleration of gravity, which is 9.8 m / s^2?
answer/question/discussion: ->->->->->->->->->->->-> :
The first equation is almost on the money. The second equation is off by almost 10%. Depending on how accurate the data needs to be, this could be acceptable.
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@&
Good. However you should be including the units of all quantities at every step of your analysis.
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