three types of lever

Three types of lever

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 1. fulcrum or pivot point2. load3. effort (the force)

LEVERS

fulcrum or pivot pointload

effort

THREE TYPES OF LEVER

1.First order of lever

2. Second order of lever

3.Third order of lever

FIRST ORDER OF LEVERS

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

load effort

fulcrum

FIRST ORDER OF LEVERS

loadeffortfulcrum

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

FIRST ORDER OF LEVERS

effort

load fulcru

m

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

load fulcrum

If load is greater than the effort Then the system is not in equilibrium

FIRST ORDER OF LEVERS

effort

load

fulcrum

If effort is greater than the load Then the system is not in equilibrium

FIRST ORDER OF LEVERS

effort

loadfulcrum

A seesaw is an example of a first class lever

FIRST ORDER OF LEVERSEXAMPLES

fulcrum

load

effort

scissors

fulcrum

load effo

rt

weigh scales crowbar

effort

Load

fulcrum

a claw hammer

FIRST ORDER OF LEVERSEXAMPLES

SECOND ORDER OF LEVERS

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

loadeffort fulcrum

SECOND ORDER OF LEVERS

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

load

effort

fulcrum

SECOND ORDER OF LEVERSEXAMPLES

fulcrum

load

effort

wheelbarrow

effort

fulcrum

nutcracker

load

load

fulcrum

effort

fulcrum

load

effort

a person stands on tip-toe

SECOND ORDER OF LEVERSEXAMPLES

THIRD ORDER OF LEVERS

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

loadeffortfulcrum

THIRD ORDER OF LEVERS

load

effort

fulcrum

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

THIRD ORDER OF LEVERSEXAMPLES

load

effort

fulcrum

load

fulcrum

effort

Fishing rod

The effort is applied somewhere in between by a muscle attached above the fulcrum, on the upper arm.

Shovelfulcrum

load

effort

TWEEZERS

load

effort

fulcrum

THIRD ORDER OF LEVERS THIRD ORDER OF LEVERSEXAMPLES