What are levers used for? We use levers to make heavy objects easier to lift.
How does a lever work? Levers work because you are exchanging lifting a large force from a short distance with lifting a small force from a far distance.
What is a lever? A rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other.
Here is an example of three classes of levers
Crowbar is a lever
The three main parts that make a lever are:
The fulcrum
The fulcrum is the pivot point of the lever.
The fulcrum can be placed anywhere along the lift arm of the lever.
Depending where you put the fulcrum lifting the load can feel easier or harder to lift.
Their is very little friction between the fulcrum and the lift arm.
The input force
The force of you or a machine pushes on an end of a lever.
Elliots intro to 3 classes of levers
Elliot's class 1 lever Elliot's class 2 leverElliot's class 3 levers
What are levers used for?
We use levers to make heavy objects easier to lift.
How does a lever work?
Levers work because you are exchanging lifting a large force from a short distance with lifting a small force from a far distance.
What is a lever?
A rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other.
Here is an example of three classes of levers
The three main parts that make a lever are:
The fulcrum
The input force
The load / output force
Here is a Short video on how levers work:
https://www.youtube.com/watch?v=RvZbk2GIGDA
Learn about levers here:
Elliot's intro to 3 classes of leversElliot's class 1 lever Elliot's class 2 leverElliot's class 3 levers
Elliot's references
Feel smart? Take the levers quiz!
Elliot's Levers quiz!!!