Answer: A simple mechanism with a fulcrum and a rigid beam is what a lever consists of. The load (output force) and effort (input force) are exerted on either end of the beam. The fulcrum is the pivot point of the beam. A weight is applied to the other end of the lever when exertion is given to one end of the lever. This will cause a mass to rise. The amount of force required to rotate an object about its axial point is torque (or pivot point).
First-Class Lever
The fulcrum of this kind of lever is positioned between the weight and the force exerted. The force-fulcrum-weight order is used to represent it. It is the most basic form of lever.
Example
- Seesaws, crowbars, or our hands pressing an object
- A wheel and axle is the example
- Also, pulling a nail from a hardwood plank is a first-class lever
Second-Class Lever
The fulcrum is basically at one end, while the force is applied at the other. The weight is in the centre of these two options.
Examples
- Wheelbarrow
- Staplers
- Openers for bottles
- Nutcrackers
Third-Class Lever
At one end of the lever, the pressure is delivered in the centre, and the weight is at the opposite end.
Examples
- Rod for fishing
- A floor-sweeping tool
- A bat is used in baseball.
- An arrow and a bow
- The jaw of a human