4. A traffic light hangs from a pole as shown below. The uniform aluminum pole AB is 8.0 m long and has a mass of 9.0 kg. If the tension in the horizontal (CD) cable is 400 N, what torque does the tension produce around point A? a. b. What is the mass of the stoplight? c. What are the forces (in the x and y directions) on the hinge at point A? в 37 3.80 m

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