A boy is swinging a weight around his head on a rope. Assume that the weight has a mass of 0.650 kg, that the rope plus the effective length of the boy’s arm has a length of 1.45 m, and that the weight makes a complete circuit in 1.34 s. Find the magnitude of the angular momentum, excluding the mass of the rope and the boy’s arm. If the mass is moving counterclockwise in a horizontal circle, what is the direction of the angular momentum?