A cord is wrapped around the rim of a wheel 0.240 {rm m} in radius, and a steady pull of 42.0 {rm N} is exerted on the cord. The wheel is mounted on frictionless bearings on a horizontal shaft through its center. The moment of inertia of the wheel about this shaft is 5.50 {rm{ {rm kg}}} cdot {rm{{rm m}}}^{rm{2}} Compute the angular acceleration of the wheel.