A thin cylindrical ring starts from rest at a height h1 = 77 m. The ring has a radius R = 28 cm and a mass M = 3 kg. a)  Given h2 = 47 m, what is the velocity of the ring at point 2 in m/s?  b) What is the ring's rotational velocity in rad/s at point 2?  c)  After passing point 2 the hill becomes frictionless and the ring's rotational velocity remains constant. What is the linear velocity of the ring at point 3 in m/s?

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