Levers may not be that powerful but they sure do make heavy lifting one heck of a lot easier. That’s not all levers can do though, for instance a car relies almost entirely on spinning levers, also known as gears. This video will show you all about that though.
Levers have also been used many times in weapons. One classic example is the catapult.
How do levers work?
For starters, the dictionary defines the lever as a rigid bar used for leverage.
But before we even begin learning about how levers work we should know about a few basic items.
1. The Fulcrum.
A fulcrum something that supports something else that relies on only the fulcrum to hold itself up. In the case of levers that something is a lever.
The load is what you are trying to lift or balance. The load is sometimes referred to as the resistance force or just resistance
The force or effort is basically the force or weight you are using to lift or balance out the load.
There are three different classes of levers.
|(Class one, two, and three levers in that order.)|
a class two lever the load is put on the middle of the lever, the force is put
on either side, and the fulcrum is put on the opposite side of the load. A good
example of a second class lever is a nutcracker.
In a class three lever the force is applied to the middle of the lever, the fulcrum is on one side of the lever, and the load is on the other side of that. A good example of a class three lever is a claw hammer.
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