Speed.
Friction.
What is the ‘cost’ for using a machine to increase force
The mechanical advantage of a machine compares the input force applied to the machine with the output force produced by the machine. It is calculated as the ratio of the output force to the input force and indicates how much a machine amplifies or reduces the input force.
The lever.
The number of times a machine can increase a force exerted on it depends on the machine's mechanical advantage. Mechanical advantage is the ratio of the output force produced by a machine to the input force applied to it. This ratio determines how many times the machine can increase the force.
mechanical advantage
If a simple machine reduces the strength of a force, then the distance over which the force is applied must be increased to compensate for the reduced strength. This is in accordance with the principle of work conservation, where work input equals work output.
The amount of force required to be exerted may increase or decrease depending on whether the machine removed was helping to do the work or obstructing it. Since, in general we say that a machine is anything that reduces human effort, so we assume that the machine was reducing human effort and thus its removal means that we need to put in more effort.
Mechanical advantage is calculated by dividing the output force of a machine by the input force required to operate it. The formula is MA = Output Force / Input Force. Mechanical advantage gives you an indication of how much a machine amplifies or reduces the input force.
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A lever can increase force by allowing the user to apply a smaller force over a longer distance to produce a larger force over a shorter distance. This mechanical advantage provided by the lever can make it easier to lift heavy objects or move them over a shorter distance.
The number of times a machine multiplies its input force is called mechanical advantage. It is a measure of how much a machine can increase the output force compared to the input force.