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December 21, 2014

December 21, 2014

Posted by **Zac** on Thursday, July 26, 2012 at 12:00pm.

standing against the wall will be stuck there, even as the floor is dropped away from their feet. The

coefficient of static friction between the person and the wall is μs

, and the radius of the cylinder is R.

a) Find an equation for the minimum period of rotation, T, needed to keep the people in place on the

wall. This equation will include μs

, R, g and π.

b) Solve for T if R = 4.00 m and μs = 0.60. What is the room's angular speed in rpm?

- Physics -
**Elena**, Thursday, July 26, 2012 at 1:21pmCentripetal acceleration is

a= v² /R= ω²R=(2π/T)²R

ma=F(fr)

m(2π/T)²R =μmg.

4π²R/T= μg.

T=4π²R/ μg

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