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Phy 121
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: ->->->->->->->->->->->-> :
‘ds = 2m
‘dt = .64s
vAve = 2m /.64s = 3.1m/s
vf = 2 * 3.1m/s = 6.2m/s
aAve = 6.2m/s / .64s = 9.7m/s^2
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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: ->->->->->->->->->->->-> :
‘ds = 5m
‘dt = 1.05s
vAve = 5m /1.05s = 4.8m/s
vf = 2 * 4.8m/s = 9.6m/s
aAve = 9.6m/s / 1.05s = 9.1m/s^2
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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: ->->->->->->->->->->->-> :
What I calculated appears to be within .1 and .7 of the acceleration of gravity 9.8m/s^2
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30 min
&#Very good responses. Let me know if you have questions. &#