SOC 20 Flashcards
What is a lever?
Levers refer to a system of mucles and bones working to bring about movement
Fulcrum
The point around which the lever rotates
A load
The force that is applied by the lever system the load is the object you want to move a dumb bell with your arm
An effort
a force that is applied by the user of the lever system. The Effort is supplied By your muscles
Lever arm
A rigid bar such as a bone
Four components of a lever
A fulcrum (or pivot)
A load
An effort
Lever arm
Different classes of levers
1st class
2nd class
3rd class
1st class is
When the fulcrum is in the middle
2nd class is
When the load is in the middle
3rd class is
When the effort is in the middle
First class lever definition
In a first class lever, the fulcrum sits in the middle,between the load and effort
Definition of second class levers
In a second class lever the load sits between the fulcrum and effort
Definition of third class
In a thrid class lever, the efoort is applied between the fulcrum and the load
What is a mechanical advantage?
when the load is greater than the effort, so you are getting more out than you are putting in. To calculate this you simply divide the input by the output.
What is a MECHANICAL DISADVANTAGE
This is the opposite of mechanical advantage of mechanical advantage. This happens when the effort and the load are both the same side of the fulcrum but the effort sits closer to the fulcrum than the load does.
In this case, the input o
