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GCSE PE > Soc 20- Lever Systems > Flashcards

Soc 20- Lever Systems Flashcards

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1
Q

What are the three types of levers?

A

First class levers
Second class levers
Third class levers

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2
Q

Fulcrum

A

The point around which the lever rotates

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3
Q

Load

A

The force that is applied by the lever system (e.g dumbbell)

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4
Q

Effort

A

A force that is applied by the user of the Lever System (supplied by muscles)

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5
Q

First class lever

A

Fulcrum is in the middle

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6
Q

Second class lever

A

Load is in the middle

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7
Q

Third class lever

A

Effort is in the middle

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8
Q

Lever arm

A

A rigid bar such as a bone

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9
Q

What is a lever?

A

In your body the term lever refers to a system of muscles and bones working together to bring about movement.

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10
Q

Lever system in the body (exercise)

A

When you exercise your muscles pull on your bones and your bones create movement acting as levers

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11
Q

First class lever system exercise

A

Tricep dip

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12
Q

First class lever system example

A

Heading in football
Neck muscles provide effort
Head + ball (load)
Top of your spine (fulcrum)

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13
Q

Second class lever system exercise / example

A

A calf raise
Body weight - load
Ball of your feet (fulcrum)
Gastrocnemius (effort)

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14
Q

Which lever system is most common?

A

Third class lever system

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15
Q

Third class lever system example / exercise

A

Dumbbell bicep curl
Effort - biceps
Fulcrum - elbow
Load - dumbbell

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16
Q

Calculating Mechanical advantage

A

Divide the input by the output

17
Q

When does a mechanical advantage happen?

A

When the output of the lever is greater than the input
When the load is greater than the effort

18
Q

Which lever systems work at a mechanical advantage?

A

First and second class levers

19
Q

When does a mechanical disadvantage happen?

A

When the effort and the load are both the same side of the fulcrum but the effort sits closer to the fulcrum than the load does.

20
Q

Which lever systems work at a mechanical disadvantage?

A

Third class levers

GCSE PE (28 decks)

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