mechanical advantage


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mechanical advantage

Etymology: Gk, mechane, machine; L, abante, superior position
the ratio of the output force developed by a muscle to the input force applied to the body structure that the muscle moves. Variations in the sizes of muscles and the lengths of bones in different individuals partially account for the differences in mechanical advantage and physical capabilities, such as speed and strength, among body types.

mechanical advantage

the difference in forces in a lever system due to the inequalities of the lever arms between the forces and the fulcrum (pivot or axis). See also efficiency.
References in periodicals archive ?
Students should write something like the following: "I would want to make a pulley with a long string, rather than a short string, because a longer string increases the mechanical advantage of the pulley.
Mechanical advantage is a measure of claw leverage, calculated from the ratio of two lever arms (Warner & Jones 1976) (Fig.
This derivation implies what is seen clinically and was seen in this study: that in order for a tourniquet to be effective, it must employ some type of mechanical advantage to occlude blood flow.
These mechanical advantages provided by the digital medium were evidenced in several ways.
That's when the mechanical advantage can make a difference in success -- faster line retrieval, consistent drag pressure, and smooth drag start-up (torque).
38s use strong-coil mainsprings, the little Colt's combination of leaf mainspring with long-hammer fall gives the action so much mechanical advantage that the trigger pull is distinctly lighter by comparison.
But Jackie Stewart and Eddie Jordan believe Irvine's mental strength could be as important as any mechanical advantage enjoyed by McLaren Mercedes driver Hakkinen.
Instead of lifting straight up, you are making use of a mechanical advantage.
Modifications include using a mechanical advantage pulley system that lifts wheelchair participants in full body harnesses and allows them to swing across to the landing using a swinging or traversing platform, a rope chat, or using a rope with a rubber stabilizer in the bottom of a loop to hold the loop open and provide for easier foot removal.
Self-propulsion on the open road goes fastest in a marathon chair or, better yet, with a handcycle where efforts are multiplied by finding the gear that provides the perfect mechanical advantage.
The recoil system utilizes a larger diameter reel, which results in a greater mechanical advantage when pulling on the starter cord.