Lever Systems Flashcards
1
Q
What are the 3 components of a lever ?
A
Fulcrum (Joints)
Resistance (Weight of body part/object)
Effort (Muscular contractions)
2
Q
What are the 3 classifications of levers ?
A
1st class (F)
2nd class (R)
3rd class (E)
3
Q
Give an example of each lever system
A
1 - Extension at the elbow
2 - Standing on your toes
3 - Bicep curl
4
Q
Analyse the joints and which lever system they are
A
Shoulder - 3
Hip - 3
Elbow (F) - 3
Elbow (E) - 1
Knee - 3
Ankle - 2
5
Q
What is mechanical advantage ?
A
Effort arm > Resistance arm
A large load can be moved with a relatively small amount of effort
6
Q
What is mechanical advantage ?
A
Effort arm < Resistance arm
Larger range of movement and speed
