( Mechanical engineering : General )
A long lever with a fulcrum near to one end offers a better mechanical advantage than a shorter one, or one with a fulcrum nearer the middle.
In caliper brakes, the long distance from the pivot to the pad reduces mechanical advantage and allows the arms to flex, reducing braking effectiveness.
Mechanical advantage is a measure of how much a force is increased by using a tool or machine. It is equal
to the force exerted by the tool or machine divided by the applied effort.
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