Lever System Flashcards Preview

GCSE PE 2018-2020 > Lever System > Flashcards

Flashcards in Lever System Deck (11)
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1
Q

What is a lever system

A

A rigid structure, such as a bar or bone, that rotates around an axis

3
Q

Fulcrum

A

The point around which the lever rotates

4
Q

Load

A

The force that is applied by the lever system. The load is the object you want to move a dumb bell with your arms

5
Q

What are the three different classes of levers

A

First Class
Second Class
Third Class

6
Q

What first class levers

A

Levers that have the fulcrum central

7
Q

What is a second class lever?

A

Lever that has the load central

8
Q

What is a third class lever

A

Lever that has the effort central

9
Q

What movement in the body is a first class lever

A

Heading the ball
The fulcrum is between the skull and first vertebrae with load being the ball and the effort coming from the neck muscles

10
Q

What movement in the body is a second class lever?

A

Calf raise
The fulcrum is at the toes with the load of your body weight sitting between your toes and heels and the gastrocnemius providing the effort

11
Q

Effort

A

A force that is applied by the user of the lever system. The effort is supplied by your muscles

12
Q

Mechanical Advantage

A

Allows a load to be moved with relatively small effort