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1. Determine the force in the hydraulic cylinder AB and the magnitude of the pin reaction at O for the position shown. The bucket and its load have a combined weight of 4000 lb with center of gravity at G. You may neglect the effect of the weights of the other members.

421_Force in the hydraulic cylinder1.png

2. The power unit A of the tractor-scraper has a mass of 5.4 Mg with mass center at G1. The fully loaded trailer-scraper unit B has a mass of 22.7 Mg with mass center at G2. Positioning of the scraper is controlled by two hydraulic cylinders EF, one on each side of the machine.

Calculate the compression F in each of the cylinders and the magnitude of the force supported by each of the pins at H, one on each side. Assume that the wheels are free to turn so that there are no horizontal components of force under the wheels.

2391_Force in the hydraulic cylinder.png

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