The figure below shows two pulleys attached by a belt. The smaller pulley is attached to a motor. When the motor rotates, it spins the smaller pulley, moving the belt, and turning the larger pulley. The larger pulley has a radius of 21 cm and undergoes a constant angular acceleration of α=0.75rad/s^2, starting from the rest. Assume the pulley belt does not slip during this motion. Determine the linear speed of the belt after 4.7s. Write the answer to two significant figures.