Lever System Flashcards
1
Q
Lever
A
A rigid structure (bone) that rotates around an axis.
2
Q
The 3 components of a lever
A
Fulcrum
Load
Effort
3
Q
Fulcrum
A
The point around which the lever rotates (axis)
4
Q
Load
A
The force that is applied by the lever system
5
Q
Effort
A
The force that is applied by the user or lever system
6
Q
The 3 classes of levers
A
First class Second class Third class
7
Q
What is a first class lever
A
The fulcrum is in the middle of the effort and the load
8
Q
What is a second class lever
A
The load is in the middle between the fulcrum and the effort.
9
Q
What is a third class lever
A
the effort is in the middle between the fulcrum and the load.
10
Q
Example of a first class lever
A
The joint between the skull and the first vertebrae
11
Q
Example of a second class lever
A
The heel joint
