angular velocity

by Miike012
Tags: angular, velocity
Miike012 is offline
Nov26-11, 11:37 PM
P: 1,011
A centrifuge is used to increase the sedimentation rate of
particles suspended in a liquid, over the rate produced
by gravity alone. Find the angular velocity of a centri -
fuge in which a particle 10.0 cm from the axis of rotation
experiences a radial acceleration of 1.00* 10^3
times gravitational acceleration g.

Solution: radius (r) = 0.01 m ; ar = 1.00*10^3*9.80

1.00*10^3*9.80 = (.01)w^2

w = ( 1.00*10^3*9.80/.01)^(1/2) = 989

Answer is 313 rad/sec....

where did I go wrong>?
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1MileCrash is offline
Nov27-11, 12:11 AM
1MileCrash's Avatar
P: 1,227
10.0 cm = 0.1 m

Do not underestimate the girth of the centimeter.
Miike012 is offline
Nov27-11, 12:18 AM
P: 1,011
thank you,

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