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A small drawbridge, showing the forces on the hinges (F)


A small drawbridge, showing the forces on the hinges (F), its weight (W) and the tension in its wires (T).  


Suppose a 900-kg car is on the bridge in Figure 9.34 with its center of mass halfway between the hinges and the cable attachments. (The bridge is supported by the cables and hinges only.) (a) Find the force in the cables. (b) Find the direction and magnitude of the force exerted by the hinges on the bridge.

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