cq_1_071

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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.

** 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: ->->->->->->->->->->->-> :

 vAve=2 meters/.64 s=3.125 m/s*2=6.25 m/s=vf, v0=0 m/s

a=6.25 m/s/.64 s=9.8 m/s^2

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@&

Your statement

 vAve=2 meters/.64 s=3.125 m/s*2=6.25 m/s=vf

asserts that vAve = vf.

Clearly this is not true, and it's not what you intended. Your intent is clear and correct.

To avoid confusing yourself and anyone who is reading your work, try to confine the use of the = sign to quantities that are in fact equal.

*@

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: ->->->->->->->->->->->-> :

 vAve=5 m/1.05 s=4.76 m/s*2=9.52 m/s=vf, v0=0 m/s

a=9.52 m/s/1.05=9.06 m/s^2

This is pretty consistent

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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 values I calculated were pretty consistent with the accepted value

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*#&!*#&!

&#This looks good. See my notes. Let me know if you have any questions. &#