Please enable JavaScript.
Coggle requires JavaScript to display documents.
Levers - Coggle Diagram
Levers
Lever Types
Second class levers have the efort force and resistance force on the same side of the fulcrum, but with the e
fort arm longer than the resistance arm
There aren't many second class levers in our body, probably the one that is most useful from the few of these is the one belonging to the gastrocnemius, where this part of the foot lifts our body weight as we point our toes.
Third class levers also have the efort and resistance forces on the same side of the fulcrum, but the effort arm is smaller than the resistance arm
These ones are the most common levers in our body, they're pretty much everywhere, and the most important is the one we use the most: by flexing our biceps we're using a third class lever.
-
-
Applied lever systems
Levers are used to decrease the level of effort that us as humans have to do to lift heavy things and moving them around without the need for complicated macinery.
There are four components to a lever, and we're supposed to put them in vertical order so that it works, first the lever, then the efforet, fulcurm and finally load
-
-
-
-
Planes of Motion
The Body is divided in three different planes, and each of them allows of a different kind of motion
The second one is the same, just that the person is facing a wall, theu can wallk to the side and move their arms towards each side.
The last one is the subject inside a cylindrical place, in this one, movement is quite limited, movements here would be rotation ones.
The first one is exemplified by setting a person in an alleyway where their shoulders touch the walls. This kind of plane only allows movement towards the front of the person, being able to extend their arms, bending knees and even crouching