a. Air is contained within a vertical piston-cylinder assembly as shown below. On its top, the 12.5-kg piston with a diameter of 125 mm is attached to a spring and exposed to an atmospheric pressure of 1.01 bar. Initially, the piston head is at a position such that the spring exerts no force on it. The valve is then opened until the pressure of air is 435 kPa and the volume is 0.50 L. When the valve is further opened to let additional air in, the piston rises 2.75 cm more. Ignoring friction between the piston and the cylinder wall, determine the pressure of the air within the cylinder when the piston is (a) in its initial position and (b) in its final position, in atm. Note that the force exerted by the spring as the air expands within the cylinder varies linearly with x. Air Figure Air supply line

a. Air is contained within a vertical piston-cylinder assembly as shown below. On its top, the 12.5-kg piston with a diameter of 125 mm is attached to a spring and exposed to an atmospheric pressure of 1.01 bar. Initially, the piston head is at a position such that the spring exerts no force on it. The valve is then opened until the pressure of air is 435 kPa and the volume is 0.50 L. When the valve is further opened to let additional air in, the piston rises 2.75 cm more. Ignoring friction between the piston and the cylinder wall, determine the pressure of the air within the cylinder when the piston is (a) in its initial position and (b) in its final position, in atm. Note that the force exerted by the spring as the air expands within the cylinder varies linearly with x. Air Figure Air supply line

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter4: Coplanar Equilibrium Analysis

Section: Chapter Questions

Problem 4.9P: The high-pressure water cock is rigidly attached to the support at D. Neglecting the weights of the...

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