You are on a carnival ride which rotates in horizontal circles
when the motor and brakes fail. Since there is not much
friction in the bearing (small dot) on which the ride pivots, you must
slow down the broken ride by leaning
out of the car (large circle) and dragging your foot in the gravel.
Shown are five possible carnival rides with the radius of the arm that
spins your car around,
the angular speed of the ride
when the motor fails, and the mass of the car you are riding in.
Which ride would be most devastating to your new pair of shoes?