Levers

Question 1

Describe a first-class lever

Answer 1

Fulcrum/Axis is located between force and resistance

seesaw

Question 2

Give an example in the human body of a 1st class lever.

Answer 2

Head sitting in first cervical vertebra, moving up and down (flexion/extension)

Question 3

Describe a 2nd-class lever

Answer 3

Axis is at one end, the resistance is in the middle, and the force is on the other end (Wheelbarrow)

Question 4

Give an example in the human body of a 2nd class lever

Answer 4

Closed chain plantar flexion (standing on toes)

Question 5

Describe a 3rd-class lever.

Answer 5

Axis is on one end, the force is in the middle, and resistance is on the other end

Question 6

Give an example in the human body of a 3rd class lever.

Answer 6

Most common in the body

The biceps working at the elbow

Question 7

What are the advantages of each type of lever

Answer 7

1st class - Balance
2nd class - Power
3rd class - Range of Motion