Lever Systems

First Class Levers:

Effort Fulcrum Load

Fulcrum in the middle

E.g: Neck raising up head

F-Neck

L-Weight of the head

E-Neck muscles

{Used for heading a ball in football}

Second Class Levers:

Fulcrum Load Effort

Load in the middle

E.g: Ankle plantarflexion

F-Ankle Joint

L-Weight of the person

E-Gastrocnemius

{Used when sprinters explode out of the blocks}

Third Class Levers:

Fulcrum Effort Load

Effort in the middle

E.g: Bicep curl

F- Elbow Joint

L- Weight of forearm and the piece of equipment weight

E-Bicep

{Used when tennis players follow through a forearm shot}