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 14.0 cm and mass 0.70 kg.

(a) Find the speed of the 2 kg block after it falls from rest a distance of 2.5 m. ANS= 3.93 m/s

(b) What is the angular velocity of the pulley at this time? in rad/s