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The raising and lowering motion of this robotic arm is controlled by a rod connected to one end' At the other end of the arm,

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The raising and lowering motion of this robotic arm is controlled by a rod connected to one end' At the other end of the arm, a 250 kg mass is suspended. lThe arm has a mass of 87 kg, and its center of mass is marked with a cross. Ifthe arm is at rest, what force does it exert on its base? Select one: a. 9900 N b. 13,000 N 4 c. 26.000 N J (1. 20,000 N The correct answer is: 26,000 N

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