As seen from above in the image, a string is wrapped around the edge of a uniform cylinder of radius R = 49 cm and mass M = 2 kg which is initially resting motionless on a frictionless table. The end of the string is pulled with a force of 66 N for 1.8 m. If the linear speed of the cylinder is found to be 6.29285 m/s, what is the angular speed of the cylinder (in rad/s)? Answer in units of rad/s.