Lecture 5 Machine Construction Simple Machines PDF
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Uploaded by DecentAqua3303
Maritime University of Szczecin
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Summary
This document explains the concept of simple machines and their mechanical advantage. It details how simple machines change the direction or magnitude of force and how mechanical advantage is calculated. It also describes various simple machines such as levers, pulleys, inclined planes, and wedges.
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Simple Machines A simple machine is a mechanical device that changes the direction or magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force. Mechanical advantage (MA) is a measure of the force amplifica...
Simple Machines A simple machine is a mechanical device that changes the direction or magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force. Mechanical advantage (MA) is a measure of the force amplification achieved by using a tool, mechanical device or machine system. Ideally, the device preserves the input power and simply trades off forces against movement to obtain a desired amplification in the output force. Mechanical advantage can be understood as a measure of the ratio of output force to input force in a system, used to analyze the forces in simple machines like levers and pulleys. Typically the mechanical advantage is expressed in ideal terms, where there is no losses in energy between the input and output times, also known as 100% efficient systems (IMA – ideal machine advantage). Despite changing the forces that are applied the conservation of energy is still true and the output energy is still equal to the input energy. 𝐹 𝑀𝐴 = 𝐹 Six simple machines
