1. A gas is confined in a 3.98ft diameter cylinder by a piston, on which rests a weight. The mass of the piston 7.25lbm and weights is 270lbm. (a) What is the force in lbf exerted on the gas by the atmosphere, the piston, and the weight, assuming no friction between the piston and cylinder? (b) What is the pressure of the gas in psia? (c) If the gas in the cylinder is heated, it expands, pushing the piston and weight upward. If the piston and weight are raised 2.2ft, what is the work done by the gas in ft-lbf? What is the change in potential energy of the piston and weight?

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Basic Terminology in Mechanics

The area of science and mathematics concerned the motion of the objects, the relation between the force matter, and motion if specified. Forces exerted over the objects result in displacements or changes in the position of an object concerning its environment. This branch of physics keeps its roots in Ancient Greece in the form of the scripts of Aristotle and Archimedes.