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PHY 241
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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: ->->->->->->->->->->->-> :
change in velocity= 3.125m/s
Acceleration= 3.125m/s/.64s= 4.88m/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: ->->->->->->->->->->->-> :
No this is not consistent with the observation because the acceleration for this observation is 4.53m/s^2 while the acceleration for the first observation is 4.88 m/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: ->->->->->->->->->->->-> :
These observations are not consistent with the accepted value of the acceleration of gravity because they are about half of the accepted value.
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*#&!
@& You have not calculated your accelerations correctly.
You have misidentified your average velocity in each sitaution as a final velocity.
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