Levers

Question 1

What is the order of a first class lever and a sporting example?

Answer 1

• RFE
• Tricep contracting at the elbow for extension

Question 2

Second class

Answer 2

• FRE
• Gastrocnemius contracting at ankle to create plantar flexion
• More than 1, so suited to strength

Question 3

Third class

Answer 3

• FER
• All other joints
• Less than one, so suited to speed/range of movement

Question 4

How do you calculate mechanical advantage?

Answer 4

Effort arm / Resistance arm