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A lever amplifies an input force to provide a greater output force, which is said to provide leverage, which is mechanical advantage gained in the system, equal to the ratio of the output force to the input force. As such, the lever is a mechanical advantage device, trading off force against movement.
The ratio of the output to the applied force is called the mechanical advantage. Simple machines can be regarded as the elementary "building blocks" of which all more complicated machines (sometimes called "compound machines" [6] [7]) are composed. [2] [8] For example, wheels, levers, and pulleys are all used in the mechanism of a bicycle.
The pound-force has a metric counterpart, less commonly used than the newton: the kilogram-force (kgf) (sometimes kilopond), is the force exerted by standard gravity on one kilogram of mass. The kilogram-force leads to an alternate, but rarely used unit of mass: the metric slug (sometimes mug or hyl) is that mass that accelerates at 1 m·s −2 ...
In physics and engineering, a free body diagram (FBD; also called a force diagram) [1] is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a free body in a given condition. It depicts a body or connected bodies with all the applied forces and moments, and reactions, which act on the body(ies).
The Air Force possesses 45 F-117s, some in flyable condition, As of 2023. The Air Force plans to operate the type through 2034. [39] F-15C/D Eagle: McDonnell Douglas: USA Jet Air superiority: Manned 1979 (F-15C/D) [40] 149 [41] 12 D variants [3] are used for training. The Air Force is seeking to divest 65 F-15s in FY2025. [42] F-15E Strike Eagle
An example of an electrical force gauge is an "electronic scale". One or more electrical load cells (commonly referred to as "weigh bars") are used to support a vertical or horizontal "live load" and are solid-state potentiometers which have variable internal resistance proportional to the load they are subjected to and deflected by. As the ...
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