General Examples

Description

Body Example

Crowbar

Scissors

Pliers

Seesaws

1st class

The Fulcrum is between the Effort and the Resistance.

 

EFR

 

Head balance on vertebral column

Triceps

Wheelbarrow

Doors

Bottle Opener

Paper Cutter

2nd Class

The Fulcrum is on one end, while the resistance is closest to the Fulcrum, then the Effort is on the other end.


FRE

standing up on ball of foot

(ball of foot is Fulcrum) (Effort is soleus and gastrocnemius at calcaneus - Resistance is body weight)

Tweezers

Snow Shovel

Broom

3rd Class

The Fulcrum is on one end, while the effort is closest to the Fulcrum, and the Resistance is on the other end.


FER (or REF)

Biceps acting at the elbow joint

Deltoid


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