[填空题]
In a "Rotor-ride" at a carnival, people are rotated in a y22nlu0- w-blj,g qdauq5h 8ocylindrically walled "(z iddus4 p fc8gi2vxadz66g r+ zt/iy;)qp.3room." (See Fig. 5-dgiqp 4i dztx2z8r (p g;. vzd 6ai)3uc+s/yf635.)
The room radius is 4.6 m , and the rotation frequency is 0.50 revolutions per second when the floor drops out. What is the minimum coefficient of static friction so that the people will not slip down? People on this ride say they were "pressed against the wall." Is there really an outward force pressing them against the wall? If so, what is its source? If not, what is the proper description of their situation (besides "scary")? [Hint: First draw the free-body diagram for a person.]
