Mechanical advantage of a lever


We can differentiate three kinds of levers, as displayed in the picture above. Each of castle is characterized by the following:

Effort - simply the allude where you apply the intake force;Fulcrum - the suggest that continues to be stationary;Resistance - the load;Motion - the direction of motion after the pressure has been applied.

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In each case, the mechanical advantage of a lever is calculated follow to the formula:

MA = initiative arm / pack arm


effort arm is the distance in between the allude of effort and the fulcrum;load arm is the distance in between the point of resistance and also the fulcrum.

Mechanical advantage of a pulley


As visible in the figure above, a sheave is a system made the wheels and also ropes that attach them. Two wheels do one pulley.

To calculate the mechanical advantage of together a system, simply use the complying with equation:

MA = 2 * n

where n is the number of pulleys directly attached come the object.

If friend were in search of a mechanism of 2 wheels of various diameters associated with a belt loop, you must head directly to our wheel calculator. And if you're trying to find applications of mechanical advantage in other system, examine out our an excellent winch dimension calculator.

Mechanical advantage of a screw


A typical screw consists of two parts: a threaded cylindrical shaft and a head. To recognize the mechanical advantage, girlfriend will require two qualities of the object (helical ridges ~ above the screw):

Diameter of the screw shaft, andLead the the thread. In simple screws, the command is equal to the distance between two adjacent threads. In double- or triple-start screws, the is characterized as the distance (parallel to the screw's axis) the screw travels in one complete change of the shaft.

The mechanical benefit formula for the screw is:

MA = π * diameter / lead

Mechanical benefit of a wedge


A wedge is a basic tool in the form of a triangle. It can be offered to split an object into two components or come lift heavy objects. The mechanical advantage formula for a wedge is dependency on the geometry:

MA = width / length

Width is measure in the horizontal direction (see the photo above),Length is measure up in the upright direction (see the photo above).

Mechanical advantage of a ramp (inclined plane)


A ramp, otherwise recognized as an skinny plane, is a flat surface tilted in ~ an edge to the horizontal. It is similar in form to a wedge - in fact, a wedge in nothing however a portable inclined plane. Also, a screw is essentially an inclined plane wrapped approximately a cylinder.

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Our mechanical benefit calculator can find the mechanical benefit of a ramp from two different formulas:

MA = l / V

MA = 1 / sin Θ

If you analysis these equations more closely, girlfriend will uncover that they space equivalent, together sin Θ = V / L.