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PE-Miss Henderson/Mr Cole > Levers > Flashcards

Levers Flashcards

1
Q

Define a lever

A

A rigid structure/bar that can move about a pivot (a force must be applied to move the weight of a lever)

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2
Q

Give an example of a lever

A

Long bones
Elbow
…

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3
Q

What is the key phrase to use to remember the order of the levers?

A

FLE

123

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4
Q

What are the 5 components of a lever system?

A 
Load(force)
Effort(force)
Fulcrum 
Effort arm
Load arm
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5
Q

What is the load(force)?

A

Weight or resistance of the lever arm and anything that is attached to it

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6
Q

What is the effort(force)?

A

Force of muscle contraction applied to move their lever

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7
Q

What is the fulcrum described as?

A

Pivot or fixed point about which the lever moves

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8
Q

What is the effort arm?

A

The(perpendicular/right angle)distance between the effort and the fulcrum

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9
Q

What is the load arm?

A

The(perpendicular/right angle)distance between the load and the fulcrum

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10
Q

Where does the effort force act?

A

Where the MUSCLE INSERTS into the lever/bone

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11
Q

What is the position of a 1st class lever?

A

Effort-fulcrum-load

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12
Q

What is the position of a 2nd class lever?

A

Effort-load-fulcrum

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13
Q

What is the position of a 3rd class lever?

A

Fulcrum-effort-load

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14
Q

What are some examples of a 1st class lever?

A

Bicep curl-extension

Execution phase of a basketball shot

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15
Q

What are some examples of a 2nd class lever?

A

Plantar flexion of divers toes

Execution phase of a basketball shot-toes

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16
Q

What are some examples of a 3rd class lever?

A

Bicep curl-flexion

Preparation of a basketball shot

17
Q

What is the most common lever?

A

3rd class

18
Q

Which lever system has a mechanical advantage?

A

2nd class

19
Q

What is a mechanical advantage?

A

A lever’s effort arm is longer than its load arm
These levers can move large loads with a small amount of effort-greater force=greater effect
greater distance from force to fulcrum=greater effect

PE-Miss Henderson/Mr Cole (21 decks)

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