A smooth circular hoop with a radius of r = m is placed flat on the floor. A m = kg particle slides around the inside edge of the hoop. The particle is given an initial speed of vi = m/s. After one revolution, its speed has dropped to vf = m/s because of friction with the floor.
(a) Find the energy transformed from mechanical to internal in the particle hoop floor system as a result of friction in one revolution.
(b) What is the total number of revolutions the particle makes before stopping? Assume the friction force remains constant during the entire motion
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