A string is wound around a uniform disc of radius 0.49 m and mass 1. The disc is released from rest with the string vertical and its top end tied to...

A string is wound around a uniform disc of radius 0.49 m and mass 1.9 kg. The disc is released from rest with the string vertical and its top end tied to a fixed support. Calculate the speed of the center of mass when, after starting from rest, the center of mass has fallen 2.7 m. The acceleration of gravity is 9.8 m/s 2 . Answer in units of m/s.