Problem 2: A pump delivers oil at a rate of Q gpm to the blank end of a 2.2-inch

Question

Problem 2: A pump delivers oil at a rate of Q gpm to the blank end of a 2.2-inch-diameter hydraulic cylinder as shown in the figure. The piston consists of a 0.8-inch-diameter cushion that is 1.15 inch long. The cylinder drives a 1200-lb weight which slides on a flat horizontal surface. The coefficient of friction between the weight and the horizontal surface is ??= 0.25. The pressure developed by the cylinder cushion is P2 = 850 psi. ? Find the fluid pressure, P1 at the blank end of the piston if the load is moved with an acceleration of 28 ft/s2. ? Obtain the flow rate in gpm delivered to the cylinder. ? Determine the power delivered by the pump to the cylinder assuming no losses between the pump outlet and the cylinder inlet. ? Find the power delivered to the pump if the pump overall efficiency is 90%.

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