In a classic carnival ride, patrons stand against the wall in a cylindrically shaped room. Once the room gets spinning fast enough, the floor drops from the bottom of the room! Friction between the walls of the room and the people on the ride make them the “stick” to the wall so they do not slide down. In one ride, the radius of the cylindrical room is R = 7.8 m and the room spins with a frequency of 20 revolutions per minute.

What is the speed of a person “stuck” to the wall?

Question

In a classic carnival ride, patrons stand against the wall in a cylindrically shaped room. Once the room gets spinning fast enough, the floor drops from the bottom of the room! Friction between the walls of the room and the people on the ride make them the “stick” to the wall so they do not slide down. In one ride, the radius of the cylindrical room is R = 7.8 m and the room spins with a frequency of 20 revolutions per minute. 

What is the speed of a person “stuck” to the wall?

anonymous · Answer

Actually the riding person is moving in a circle of radius R and frequency = 20 rpm =20*2pi/60  s^-1
speed of the person s = radius times frequency.