Levers

Question 1

What are the 3 parts that make up a lever
Name-apply to human body

Answer 1

Fulcrum-joint
Load-weight you are heaving
Effort-Muscular contractions

Question 2

What is the memory tool used to remember what is in the middle of each lever class

Answer 2

1 F
2 L
3 E

Question 3

What are the movements associated with each lever class

Answer 3

Class 1:
Movement of the neck/head (flexion/extension)
Elbow extension

Class 2:
Plantar Flexion at the ankle

Class 3:
every other movement

Question 4

What is the effect of the effort arm being longer than the load arm

Answer 4

Mechanical advantage

Question 5

What is the effect of the effort arm being shorter than the load arm

Answer 5

Mechanical disadvantage

Question 6

What are the effects of mechanical advantage

Answer 6

Carry heavy loads with little effort
Can generate larger forces
Lower range of movement

Question 7

What are the effects of mechanical disadvantage

Answer 7

Faster movements
Wider range of movements
Need more effort to move larger loads

Question 8

What does effort arm and load arm mean

Answer 8

The distance of the effort and load from the fulcrum