(Answered) A 210-kg robotic arm at an assembly plant is extended

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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?

(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

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