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A heavy concrete panel is being lifted into position in a building by means of a crane (see figure below). The tension of 1.89 104 N in the supporting cable produces a torque with respect to point O. (Let L = 39.3 m.)

(b) Find the torque.


    torque = force•arm of the force =
    =1.89•10^4•39.3=7.43•10^5 N•m

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