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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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Related Topics
- Mechanics - Kinematics, forces, vectors, motion, momentum, energy and the dynamics of objects
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Related Documents
- Movement Ratio - Machines and movement ratio (velocity ratio)
- Pulleys - Pulley basics





