# Three types of lever.

## Presentation on theme: "Three types of lever."— Presentation transcript:

Three types of lever

LEVERs A lever is any kind of rigid bar that sits on a pivot point or fulcrum and rotates about that point. It may be used to move a heavy object with a force that is smaller than the weight of the object. A lever has three parts  fulcrum or pivot point load effort (the force) load effort fulcrum or pivot point

1.First order of lever 2. Second order of lever 3.Third order of lever
Three types of lever 1.First order of lever 2. Second order of lever 3.Third order of lever

First order of levers fulcrum load effort
In this type of lever, the fulcrum is in the middle between the load and the effort.

First order of levers effort load fulcrum
In this type of lever, the fulcrum is in the middle between the load and the effort.

First order of levers load effort fulcrum
The lever will balance if the load and effort are equal, and same distance from the fulcrum. Then the system is in equilibrium.

First order of levers effort fulcrum load
If load is greater than the effort Then the system is not in equilibrium

First order of levers load fulcrum effort
If effort is greater than the load Then the system is not in equilibrium

A seesaw is an example of a first class lever
First order of levers effort load fulcrum A seesaw is an example of a first class lever

First order of levers Examples

First order of levers Examples

SECOND order of levers effort load fulcrum
In this type of lever, The load is between the effort and the fulcrum .

SECOND order of levers effort fulcrum load
In this type of lever, The load is between the effort and the fulcrum. The fulcrum is at one end of the lever.

second order of levers Examples

second order of levers Examples

In this type of lever ,the effort between the fulcrum and the load.
Third order of levers fulcrum effort load In this type of lever ,the effort between the fulcrum and the load.

In this type of lever ,the effort between the fulcrum and the load.
Third order of levers load fulcrum effort In this type of lever ,the effort between the fulcrum and the load.

third order of levers Examples
fulcrum Fishing rod Shovel effort load effort load fulcrum The effort is applied somewhere in between by a muscle attached above the fulcrum, on the upper arm. TWEEZERS load effort fulcrum effort load fulcrum

third order of levers Examples Third order of levers