Question: Horizontal normal as the centripetal force: In a Rotor - ride at a carnival, people pay money to be revolved in a vertical cylindrically walled

Horizontal normal as the centripetal force: In a Rotor-ride at a carnival, people pay money to be revolved
in a vertical cylindrically walled room.
(a) People describe this ride by saying they were being pressed against the wall. Is this true? Is there really
an outward force pressing them against the wall? If so, what is its source? If not what is the proper
description for their situation?
(b) If the room radius is 5.0 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?

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