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A truck weighing W₁ = 4000 lbs. pulling a W₂ = 20 ton trailer is stalled on a 30 ft long bridge W₃ = 8000 lbs. (1 ton = 2000 lbs.) Consider the weight of the bridge at its center. The truck is stalled at a distance of 10 ft from the left end and the trailer is 20 ft from the left end. Find the forces on the left end F₁ and on the right end F₂ of the bridge.

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