Force Ratio
Force ratio or mechanical advantage
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A machine is a device that can change the magnitude and line of action of a force.
Examples of machines are
- pulley systems
- gear systems
- screw-jacks
A simple machine amplifies the input force (effort) to a larger output force (load). The force ratio can be expressed as
Fr = F / S (1)
where
Fr = force ratio
F = load force (N)
S = effort force (N)
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