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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: ->->->->->->->->->->->-> scussion:
vAve = `ds/`dt = 2m/.64 s = 3.13m/s
vf=2*3.125 m/s = 6.25m/s vf = `dv
`dv/`dt = (6.25m/s)/.64s = 9.8/s^2 (approx)
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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: ->->->->->->->->->->->-> scussion:
vAve = `ds/`dt = 5m/1.05 s = 4.76m/s
vf=2*4.76 m/s = 9.52 m/s vf = `dv
`dv/`dt = (9.52m/s)/1.05s = 9.07/s^2 (approx)
It's consistent enough given that these are both made from observation.
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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: ->->->->->->->->->->->-> scussion:
The second one seems a little out of my comfort zone for consisent, but it's in the ballpark.
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&#Very good responses. Let me know if you have questions. &#