three types of lever
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
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