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1st class lever
Fulcrum is between the effort and the resistance. - in the Atlanto - occipital joint in the neck
EX: seesaw, nodding head
2nd class
Resistance is in between the fulcrum and effort - in the ankle joint
EX: wheelbarrow, standing on toes
3rd class
Effort between the fulcrum and resistance - in the elbow joint
EX: bicep curl, bending your arm
Examples of pictures
