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September 22, 2014

September 22, 2014

Posted by **Leah** on Friday, November 11, 2011 at 12:48am.

a grindstone for which the moment of inertia

is 0.158 kg · m2.

Find the angular speed after the grindstone

has made 18 rev.

Assume the grindstone

starts from rest.

Answer in units of rad/s

- Physics -
**Damon**, Friday, November 11, 2011 at 4:45ama = 27.2/.158 = 172 radians/second^2

18*2pi= 0 + 0t + (1/2)(172)t^2

113 = 86 t^2

t = 1.15 seconds

w = 0 + a t

w = 172*1.15 = 197 radians/second

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