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SHHS - GCSE PE Unit 1 > 2.1 Lever systems > Flashcards

2.1 Lever systems Flashcards

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1
Q

Remember…

123 =

A

FLE

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2
Q

What are the four parts to a lever?

A
  1. Effort
  2. Fulcrum
  3. Load
  4. Lever arm
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3
Q

What is the fulcrum?

A

The pivot point of the lever e.g. the joint

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4
Q

What is the effort?

A

The force applied to use the lever e..g the muscle contracting

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5
Q

What is the load?

A

The force applied by the lever e.f what is being moved

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6
Q

How many classes of lever are there?

A

3

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7
Q

What is in the middle of a first class lever?

A

The fulcrum

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8
Q

What is in the middle of a second class lever?

A

The load

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9
Q

What is in the middle of a third class lever?

A

The effort

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10
Q

Name the 2 first class levers in the body?

A

The neck - tilting backwards

Elbow extension

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11
Q

Name the 1 second class lever in the body?

A

Plantar flexion

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12
Q

Name the third class levers in the body?

A

All movements apart from

  • neck
  • elbow extension
  • plantar flexion
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13
Q

What are the advantages of a first class lever?

A

Large load can be lifted with a small amount of effort

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14
Q

What are disadvantages of a first class lever?

A

Limited flexibility

Slow movements - not good for generating power

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15
Q

What are the advantages of a second class lever?

A

Large load can be lifted with a small amount of effort

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16
Q

What are the disadvantages of a second class lever?

A

Limited flexibility

Slow movements - not good for generating power

17
Q

What are the advantages of a third class lever?

A

Fast movement

Large range of movement

18
Q

What are the disadvantages of a third class lever?

A

A large amount of effort is required

19
Q

What is meant by the term ‘mechanical advantage’?

A

The effort required is less than the load

20
Q

What is meant by the term ‘mechanical disadvantage’?

A

The effort required is greater than the load

21
Q

Which class of lever work with a mechanical advantage?

A

First and second class

22
Q

Which class of lever work with a mechanical disadvantage?

A

Third class

SHHS - GCSE PE Unit 1 (11 decks)

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