Levers

What are the 3 Elements Essential in All Types of Levers

• A = axis

• R = resistance

• F = Force

What are the 3 Types of Levers and their Arrangement?

• first class levers - RAF

• second class levers - ARF

• third class levers - AFR

What is the Arrangement of the First Class Lever?

RAF

What is the Arrangement of the Second Class Lever?

ARF

What is the Arrangement of the Third Class Lever?

AFR

Fill in the Blank

third

The Force goes Up in every Lever Except…

first class lever

Examples of First Class Levers

• tricep extension of the forearm

• nodding your head

Examples of Second Class Levers

• standing on your toes

• push ups

Examples of Third Class Levers

• bicep flexion of the forearm

• flexion and extension of the knee

What makes a 3rd Class Lever Special and Useful?

they allow for more speed and velocity through a movement

What makes a 2nd Class Lever Special and Useful?

they make lifting heavy loads easier by reducing the force required to move them