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posted by  JennE on 12/3/2007 9:47:25 PM  |  status: Live  

Average Velocity

Course Textbook Chapter Problem
Algebra Based Physics Physics (7th) by Cutnell, Johnson N/A N/A
Question Details:
A baseball is dropped from rest from teh top of a roof and fell 10 meters to the ground. Assume the direction is positive. The average velocity of the baseball during the free falling motion is?
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Scholar
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posted by shadowfall on 12/3/2007 9:58:10 PM  |  status: Live
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JennE's comment:
"the answer comes out to be -7...I dont get how?"
Response Details:
This is an interesting problem becuase they do no provide your with much information they only give you:
ΔX=10m
g=-9.81m/s2 this is given becuase the problem says dropped so this automaticlly means that its acceleration will be -9.81m/s2
 the only answer I can see would be -9.81m/s
or something that would have to do with the equation Vf2=Vi2+2gΔx and you have to rearange it
anyone care to confirm??

 
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posted by Gorilla :) on 12/3/2007 10:07:02 PM  |  status: Live
Asker's Rating: Not Helpful   
JennE's comment:
"answer is -7...not sure how to get it"
Response Details:





V= -9.8m/s




m/s
 
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posted by Gorilla :) on 12/3/2007 11:32:15 PM  |  status: Live
Asker's Rating: Lifesaver   
JennE's comment:
"Thanks! you must be a genius!! "
Response Details:





m/s
 
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