A cylinder and pulley turn devoid of friction regarding stationary horizontal axles which pass via their centers. A light rope is wrapped about the cylinder, passes over the pulley, and consists of a 4.00 kg box hanged from its free end. There is no slipping between the rope and the pulley surface. The uniform cylinder consists of mass 5.00 kg and radius 40.0 cm. The pulley is a uniform disk having mass 2.00 kg and radius 20.0 cm. The box is free from rest and descends as the rope unwraps from the cylinder. Determine the speed of the box when it has fallen 1.50 m.