Levers Flashcards
How many lever systems are there
3
During which movement does the 1st class lever system occur?
Elbow extension
At which part of the body do we see a 2nd class level system?
The ankle
How is a fulcrum represented when drawing a lever system?
Triangle
How is a resistance represented when drawing a lever system?
Rectangle
How is effort represented when drawing a lever system?
Arrow
In a first class lever system, what is drawn in the centre?
Triangle (fulcrum)
In a second class lever system, what is drawn in the centre?
Rectangle (resistance)
In a third class lever system, what is drawn in the centre?
Arrow (effort)
Identify two advantages of a second class lever system
- The effort arm is longer than the resistance arm.
- This allows the performer to generate a lot of force with minimal effort.
- Beneficial when jumping as high as possible during a high jump.
Identify 2 disadvantages of a second class lever system
- The resistance arm is shorter than the effort arm.
- This means there is a short range of movement.
Identify two advantages of a third class lever system
- The resistance arm is longer than the effort arm.
- This allows for a large range of movement.
- This also allows movements to occur faster, which helps build momentum.
- This means that a long jumper can lift their legs higher during the flight phase and can also build more momentum within the run up.