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PHY 231
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.
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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 = 2 m/ .64 s
= 3.125 m/s
vf = 3.125m/s * 2
=6.25 m/s
delta v = 6.25 m/s
a = 6.25 m/s / .64
= 9.77 m/s/s
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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: ->->->->->->->->->->->-> :
No, in this situation acceleration is 9.07 m/s/s. This is less than gravity.
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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 is very close. Close enough that I would answer yes; however, the second is .7 m/s/s slower than gravity.
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&#This looks very good. Let me know if you have any questions. &#