(adsbygoogle = window.adsbygoogle || []).push({}); HELP!!!A dynamics problem

1. The problem statement, all variables and given/known data

In a carnival ride called the Rotor, people stand against the inside wall of cylindrical chamber. when the chamber rotates with a sufficiently high angular velocity, the floor of the chamber is lowered and the people "stick" to the wall. the coefficient of static friction between a person and the wall is mu(s)=0.5 and the radius of the chamber is r=3.5m.

what is the minimum angular velocity, omega, of the chamber (in revolutions per minute) that will keep the people from sliding down the wall?

3. The attempt at a solution

a=(omega)^2*radius

two unknown variables

therefore, we need to find the acceleration

Frictional force=mu(s)*m*g

mu(s)=0.5 g=9.8

frictional force=0.5*m*9.8

and

frictional force=ma

mu(s)*m*g=ma

a=mu(s)*g

sub the a I got into a=(omega)^2*radius to find omega

however, while i was trying to find the frictional force, there are two unknown variables, which are frictional force and the mass. I think that i can solve this question as soon as I know the mass for the person...can anyone teach me how to find the mass of the person?

Thank you for helping me.

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# Homework Help: HELP A dynamics problem

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