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Scholar
Karma Points: 200
Respect (95%):
Date Posted: 5/31/2008 5:09:18 AM  Status: Live
angular speed
Course Textbook Chapter Problem
General Physics N/A N/A N/A
Question Details:
A hard drive reaches 5400 rpm in 3.2 seconds.  What was the average angular speed assuming constant angular acceleration?
 
a- 243 rad/s
b- 283 rad/s
c- 1350 rad/s
d- 2700 rad/s
 
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Oracle
Karma Points: 21,772
(Ohio University Main Campus)
Date Posted: 5/31/2008 5:32:47 AM  Status: Live
Asker's Rating: Helpful   
Response:
Correct choce (b) 283 rad/s.
 
Average sped = (0 + w)/2 = 2700 rpm
                      = 2700x2π/60 rad/s
                     = 283 rad/s
 
   
RN's Comment:
thanks
 
Kayen (Enjoys helping you uderstand..)
Please do not forget to Rate my Response.

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Oracle
Karma Points: 32,833
Date Posted: 5/31/2008 7:16:39 AM  Status: Live
Asker's Rating: Helpful   
Response:

A hard drive reaches 5400 rpm in 3.2 seconds. 
What was the average angular speed assuming
constant angular acceleration?
      
a- 243 rad/s
(b)- 283 rad/s    <--- (1/2)*(0 + 5400)*(2*Pi/60)
c- 1350 rad/s
d- 2700 rad/s
   
.
RN's Comment:
thank u
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Guru
Karma Points: 2,126
(Paideia (Atlanta, GA))
Date Posted: 7/1/2008 2:20:32 PM  Status: Live
Asker's Rating: Somewhat Helpful   
Response:
b- 283 rad/s
RN's Comment:
i rate higher for early responses thx
Rate or not rate!!! What goes around comes around!!!



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