Each ball has a negligible size and a mass of 11.5 kg and is attached to the end of a rod whose mass may be neglected. The rod is subjected to a torque M = (t2+2) N⋅m, where t is in seconds. Each ball has a speed v = 2 m/s when t = 0.

Determine the speed of each ball when t = 3 s.

Express your answer to three significant figures and include the appropriate units.