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How much easier and faster a machine makes your work is the mechanical advantage of that machine. In science terms, the mechanical advantage is the number of times a machine multiplies your effort force.
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library.thinkquest.org/CR0210120/Mechanical%20Advantage...
library.thinkquest.org/CR0210120/Mechanical%20Advantage.html
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A single moveable pulley has a Mechanical Advantage = 2. Consider a pulley attached to a weight being lifted. A rope passes around it, with one end attached to a fixed point above, e.g. a barn roof rafter, and a pulling force is applied upward to the other end with the two lengths parallel.
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www.edinformatics.com/math_science/simple_machines/mech...
www.edinformatics.com/math_science/simple_machines/mechanical_advantage.htm
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This video uses working simple machines to demonstrate how to calculate mechanical advantage. Suitable for any school program involving simple machines. Demonstrates pulley systems including a chain block.
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www.youtube.com/watch?v=yfAdmRJDKIc
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Title: Mechanical Advantage ... James Bourassa; John Rosz; ... Now Available - Click Here to Purchase...
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www.wisc-online.com/objects/index_tj.asp?objID=ENG20504
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Archimedes understood the concept of mechanical advantage and how to use it to move or lift heavy objects with less force. The mechanical advantage of a machine is the ratio of the output and input forces that are used within the machine.
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www.swe.org/iac/lp/pulley_03.html
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Click image to enlarge ... In physics, the ratio by which the load moved by a machine is greater than the effort applied to that machine. ... The exact value of a working machine's MA is always less than its theoretical value because there will always be some frictional resistance that increases the effort necessary to do the work.
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www.tiscali.co.uk/reference/encyclopaedia/hutchinson/m0...
www.tiscali.co.uk/reference/encyclopaedia/hutchinson/m0025328.html
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Advantage Mechanical-Refrigeration, Inc. is a mechanical contracting firm that provides a full scope of mechanical services to customers across Michigan. We specialize in industrial, institutional and commercial markets.
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When a machine takes a small input force and increases the magnitude of the output force, a mechanical advantage has been produced. If a machine increases an input force of 10 pounds to an output force of 100 pounds, the machine has a mechanical advantage (MA) of 10. This is shown below:
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www.uark.edu/depts/aeedhp/agscience/simpmach.htm
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