Movement And Analysis

Question 1

Fulcrum

Answer 1

Part of lever system that pivots

Joints are the fulcrum

Question 2

Resistance

Answer 2

Load to be moved by a lever system

Usually involves weight when body’s lever systems are involved

Question 3

Effort

Answer 3

Force applied to move the resistance or weight

In the body, effort is provided by muscles exerting a force

Question 4

First Class Lever

Answer 4

Fulcrum in the middle

E.g. Triceps during extension.
Elbow is fulcrum
Hand is load
Effort applied by muscle to move resistance in hand

Question 5

Second Class Lever

Answer 5

Resistance in middle

E.g. Ankle joint
Fulcrum is ball of foot
Effort is contraction of Gastrocnemius
Resistance is weight of person

Question 6

Third Class Lever

Answer 6

Effort in middle

E.g. Biceps acting on elbow joint to move resistance in hand

Question 7

Mechanical Advantage Equation

Answer 7

Mechanical Advantage = Effort Arm ÷ Resistance Arm

Question 8

What class lever does the majority of the joints in the body act as?

Answer 8

Third