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.
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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: ->->->->->->->->->->->-> :
First we must find the average velocity
Average velocity = 2 meters / .64 sec
Average velocity = 3 m/sec
Now we can find final velocity of 6 m/sec.
Acceleration = 6 m/sec / .64 sec
Acceleration = 9.4 m/sec^2
• 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: ->->->->->->->->->->->-> :
Average velocity = 5 meters / 1.05 sec
Average velocity = 4.8 m/sec
Final velocity = 9.6 m/sec
Acceleration = 9.6 m/s / 1.05 sec
Acceleration = 9.14 m/sec^2
The answers are not the same but they are within .26 of each other.
• Are these observations consistent with the accepted value of the acceleration of gravity, which is 9.8 m / s^2?
answer/question/discussion: ->->->->->->->->->->->-> :
The observations are not the exact same but the first observation is within .4 and the second observation is within .66.
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15 minutes
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Very well done.