Biomechanics - The Components Of A Level System Flashcards Preview

A-Level PE Anatomy And Physiology > Biomechanics - The Components Of A Level System > Flashcards

Flashcards in Biomechanics - The Components Of A Level System Deck (12)
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1

Define what a lever is

A lever is ridged structure or bar that moves around a pivot

2

Define resistance

Resistance is the weight of the lever arm and anything attached to it

3

Define effort

Effort is the force of muscle contraction applied to move the lever

4

Define fulcrum

The fulcrum is the fixed point about which the lever moves

5

Define effort arm

The effort arm is the perpendicular or right angle distance between the effort and the fulcrum

6

Define load arm

The load arm is the perpendicular or right angle distance between the load and the fulcrum

7

Which side of the elbow joint does the tricep brachii attach

On the side of the humerus bone

8

What two factors determine the effect of a force within a lever system

1. Size of force (greater force = greater effect)
2. Distance from force to fulcrum (greater distance = greater effect)

9

How is a mechanical advantage classified

A mechanical advantage is classified by the effort arm being longer than the load arm

10

How is a mechanical disadvantage classified

A mechanical disadvantage is classified by the load arm being greater than the effort arm

11

What is the advantage of a mechanical advantage

You can move a lot of weight with little effort (short ROM)

12

What is the advantage of a mechanical disadvantage

You can move a large range of motion quickly

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