Levers

Question 1

How many different types of levers are there?

Answer 1

3

Question 2

What are the names of the 3 levers?

Answer 2

1st class lever 
2nd class lever
3rd class lever

Question 3

What does FLE stand for?

Answer 3

Fulcrum
Load
Effort

Question 4

What does fulcrum mean?

Answer 4

The fulcrum is where the rotation/movement of the lever takes place.

Question 5

Where does the fulcrum take place?

Answer 5

In the body, the fulcrum is the joint.

Question 6

What does load mean?

Answer 6

The load is any weight that needs to be moved.

Question 7

Where does the load take place?

Answer 7

In the body, the load is the weight of the moving body part.

Question 8

What does effort mean?

Answer 8

The effort is the force needed to move the load.

Question 9

Where does the effort take place?

Answer 9

In the body, the effort is the muscle.

Question 10

What are the functions of the lever?

Answer 10

• To produce the necessary force to move a load
• To produce a larger range of movement
• To increase the speed of body movement

Question 11

What is the mechanical advantage equation?

Answer 11

Mechanical advantage = effort arm / resistance arm

Question 12

What is in the 1st class lever?

Answer 12

Effort - Fulcrum - Load

Question 13

What is in the 2nd class lever?

Answer 13

Effort - Load - Fulcrum

Question 14

What is in the 3rd class lever?

Answer 14

Load - Effort - Fulcrum

Question 15

What does the 1st class lever enable?

Answer 15

Enables movement to be balanced, and produces a wider range of movement than a second-class lever, but can produce less force.

Question 16

What does the 2nd class lever enable?

Answer 16

It allows a mechanical advantage, so this allows to produce a large force to overcome a heavy load. This results in a lack of motion and speed.

Question 17

What does the 3rd class lever enable?

Answer 17

It allows a mechanical advantage. Enables quick movements and a large range of motion. The mechanical disadvantage is that it takes a large amount of force to overcome resistances.

Question 18

Which lever is the most common in the body?

Answer 18

The 3rd class lever.

Question 19

Examples of 1st class lever?

Answer 19

Triceps dips, rowing and movements which involve pushing down with the triceps.

Question 20

Examples of 2nd class lever?

Answer 20

A gymnast standing on their tiptoes, also a push up.

Question 21

Examples of 3rd class lever?

Answer 21

A basketball shot, kicking a football, hitting a tennis shot, and a bicep curl.

Question 22

What are the mechanical advantages of levers?

Answer 22

• The arm refers to the distance between the fulcrum and the effort.
• Longer effort arms can produce more force e.g 2nd class
• shorter effort arms enable quicker movements e.g 3rd class