Mechanical Advantage of a Lever Calculator

Mechanical advantage is the measure of the amount of energy saved by using tools or mechanical devices. In other words, it is the advantage gained by using a mechanical system while transmitting force. Lever is one of the most commonly used simple tool that produces mechanical advantage. This online is used to find the mechanical advantage of all the three class of levers.

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Mechanical advantage is the measure of the amount of energy saved by using tools or mechanical devices. In other words, it is the advantage gained by using a mechanical system while transmitting force. Lever is one of the most commonly used simple tool that produces mechanical advantage. This online is used to find the mechanical advantage of all the three class of levers.

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Formula:

Mechanical Advantage of First Class Lever
MA = d1 / d2 Mechanical Advantage Lever First Class
Mechanical Advantage of Second Class Lever
MA = d1 / d2 Mechanical Advantage Lever Second Class
Mechanical Advantage of Third Class Lever
MA = d2 / d1 Mechanical Advantage Lever Third Class
Where, MA = Mechanical Advantage d1 = Effort Arm d2 = Load Arm

Levers are classified as first, second and third class based on the position of the fulcrum, input and output forces.
i) When fulcrum is in middle and effort is applied on one side and load on other side, it is first class lever.
ii) When the load is in between the effort and fulcrum, it is second class lever.
iii) When the effort is in between the load and the fulcrum, it is third class lever.

Example:

Mechanical Advantage of a Lever

If the effort arm is 5 and the load arm is 7, then
MA of first and second class = 5 / 7
MA of first and second class = 0.7143

MA of third class = 7 / 5
MA of third class = 1.4


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