4.50 The homogeneous 18-kg pulley is attached to the bar ABC with a pin at B. The mass of the bar is negligible. The cable running over the pulley carries a tension of 600 N. Determine the magnitudes of the support reactions at A and C. - 240 240- 600 N B A 120 + 96 40° 18 kg 600 N Dimensions in mm Fig. P4.50 C