Laboratory Instruments

Ok, there are three problems:
1) A centrifuge accelerates from rest to 11,000 rpm in 200 s. Through how many revolutions did it turn in this time?
2) A wheel 75.0 cm in diameter accelerates uniformly from 240 rpm to 350 rpm in 5.5 s. How far will a point on the edge of the wheel have traveled in this time?
3) A cooling fan is turned off when it is running at 700 rev/min. It turns 1700 revolutions before it comes to a stop.
(a) What was the fan’s angular acceleration, assumed constant?
(b) How long did it take the fan to come to a complete stop?
Help would be greatly appreciated!

2 Comments zu “Physics Help!!!!!?”

1. shaque
   2-27-2010 @ 09:53

   1.36666.67revolutions
   2.63.3radians

   
   

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2. chance w
   2-27-2010 @ 16:29

   1.36300 revolutions

   
   

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