A 210-kg robotic arm at an assembly plant is extended horizontally (see figure below). The massless support rope attached at point B makes an angle of 21.0° with the horizontal, and the center of mass of the arm is at point C. (Assume that L1 = 1.30 m and L2 = 2.50 m.)
(a) What is the tension in the support rope?
N
(b) What are the magnitude and direction of the force exerted by the hinge A on the robotic arm to keep the arm in the horizontal position?
magnitude N direction ° counterclockwise from the +x axis