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Lever system, Mechanical advantage, Movements at joints - Coggle Diagram
Lever system, Mechanical advantage, Movements at joints
Mechanical advantage
Levers with a longer effort arm is said to have a mechanical advantage.
Levers with mechanical advantage can move large loads with relatively small amounts of effort.
1 st & 2nd class levers always work at a mechanical advantage
Mechanical Disadvantage
When a levers load arm is longer than its effort arm is is said to have mechanical disadvantage.
It has a low load force to effort ratio.
3rd class levers always work at a mechanical disadvantage.
They produce a large range of movement and therefore the speed at the end of a lever is greater.
You can see this in the body and when the body uses equipment.
Mechanical Advantage or Disadvantage
Mechanical advantage is related to the amount of force applied to the lever.
Large loads can be moved with relatively small amounts of efforts
If more force is applied due to the length of the lever it is working at a mechanical disadvantage .
This however does have its own benefits. The speed of movement you generate from a mechanically disadvantaged lever is greater.
Planes
Sagittal plane-
Divides the body vertically into left and right sides.
Frontal Plane-
Divides the body vertically from front to back.
Transverse Plane-
Divides the body horizontally from front to back.
Axes
Frontal Axis-
Passes horizontally through the body from left to right.
Vertical Axis-
Passes vertically through the middle of the body.
Sagittal Axis-
Passes horizontally through the body from front to back.