What are levers?
Levers in our body are formed from bones, joints and muscles.
1st class
the fulcrum is in the middle of the effort and the load.
2ed class
the load is in the middle between the fulcrum and the effort.
3ed class
the effort is in the middle between the fulcrum and the load.
example 1st?
heading football
example 2ed?
take off in long jump
example 3ed?
swinging bat
Mechanical advantage?
The load arm is shorter than the effort arm, so there is a mechanical advantage, but then there is slow movement and limited flexibility.
Mechanical disadvantage?
The load arm is longer than the effort arm, so there is a mechanical disadvantage, but then there is fast movement and wage range of flexibility.
Frontal plane?
A vertical plane but thisdivides the body intofrontandback.
Transverse plan?
A horizontal plane thatdivides the body intoupperandlowerhalves.
Sagittal plane?
A vertical planethatdividesthe body intorightandleftsides.
Movement for frontal plane?
Abductor and adductor
Movement for transverse plane?
Rotation
Movement for sagittal plane?
Extension and flexion
Sporting example frontal plane?
jumping jack
Sporting example transverse plane?
golf swing
Sporting example sagittal plane?
kicking a football
Sagittal axis?
Runs through the bodyhorizontally from thebacktofront.
Vertical axis
Runs through the bodyvertically from the top tobottom.
Frontal axis?
Runs through the bodyhorizontally from thelefttoright.
Sporting example sagittal axis?
cartwheel
Sporting example vertical axis?
ice skater spinning
Sporting example frontal axis?
somersault
