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Levers Class II Levers
Class I Levers - Machine and Levers
4495    Arnab De    13/11/2018

Class I Levers

These types of levers, the fulcrum F is in between the effort E and the load L as shown in figure. Note that the fulcrum F need not be at the mid-point between the load L and the effort E. The load and effort is works in the same direction. In general the effort arm is greater than load arm.

In fig. AB is a class I leaver, F is fulcrum. Load L is hang from the point B. and an effort E apply from the point A. here AF is effort arm and BF is the load arm. Here,

Applied Effort x Effort Arm = Mass x Load Arm

E x AF = W x BF

M.A = W/E = AF / BF

Mechanical advantage of class I lever depends on the ratio of the length of effort arm and load arm.

• If effort arm is longer than load arm then mechanical advantage is greater 1. And in this case we can get maximum output by applying minimum effort. Handle of tube well.
• If effort arm is smaller than load arm then mechanical advantage is less than 1. And in this case we can get minimum output by applying maximum effort. Eg seesaw
• If effort arm is equal to the load arm then mechanical advantage is exactly 1. And in this case we can get no mechanical advantage. e.g. Weight machine
Levers Class II Levers
Author Details
Arnab De
I have over 16 years of experience working as an IT professional, ranging from teaching at my own institute to being a computer faculty at different leading institute across Kolkata. I also work as a web developer and designer, having worked for renowned companies and brand. Through tutorialathome, I wish to share my years of knowledge with the readers.
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