A 4 kg block resting on a frictionless horizontal ledge is attached to a string that passes over a pulley and is attached to a hanging 2 kg block. The pulley is a uniform disk of radius 9 cm and mass 0.2 kg.
a. Find the speed of the 2 kg block after it falls from rest a distance of 2.5 m.
b. What is the angular velocity of the pulley at this time?
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