Levers Flashcards

1
Q

How many lever systems are there

A

3

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2
Q

During which movement does the 1st class lever system occur?

A

Elbow extension

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3
Q

At which part of the body do we see a 2nd class level system?

A

The ankle

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4
Q

How is a fulcrum represented when drawing a lever system?

A

Triangle

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5
Q

How is a resistance represented when drawing a lever system?

A

Rectangle

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6
Q

How is effort represented when drawing a lever system?

A

Arrow

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7
Q

In a first class lever system, what is drawn in the centre?

A

Triangle (fulcrum)

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8
Q

In a second class lever system, what is drawn in the centre?

A

Rectangle (resistance)

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9
Q

In a third class lever system, what is drawn in the centre?

A

Arrow (effort)

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10
Q

Identify two advantages of a second class lever system

A
  • 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.
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11
Q

Identify 2 disadvantages of a second class lever system

A
  • The resistance arm is shorter than the effort arm.
  • This means there is a short range of movement.
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12
Q

Identify two advantages of a third class lever system

A
  • 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.
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