Levers

Question 1

What are the components of levers

Answer 1

-Lever arm
-Fulcrum
-Effort
-Resistance / weight

Question 2

In the body, what is the lever arm

Answer 2

The bone being moved

Question 3

In the body, what is the effort

Answer 3

Muscular force that moves the load

Question 4

In the body, what is the Fulcrum

Answer 4

The point of movement, generally at the centre of a joint

Question 5

In the body, what is the load

Answer 5

The body’s weight or an external object. It will move as the result of the effort on the lever

Question 6

Order of the first class lever

Answer 6

Effort – Fulcrum – Load

Question 7

Order of the second class lever

Answer 7

Effort – Load – Fulcrum

Question 8

Order of the third class lever

Answer 8

Fulcrum – Effort – Load

Question 9

What is in the middle of first class lever

Answer 9

Fulcrum

Question 10

What is in the middle of Second class lever

Answer 10

Load

Question 11

What is in the middle of third class lever

Answer 11

Effort

Question 12

Advantages of the firs & second class levers

Answer 12

Provide a force to lift heavy Load

Question 13

Advantages of the third class lever

Answer 13

Provides speed and a wide range of movement

Question 14

Disadvantages of the first & second class levers

Answer 14

Small range of movement, cannot move load quickly

Question 15

Disadvantages of the third class lever

Answer 15

Greater force required than the load to move

Question 16

An example of first class lever

Answer 16

Nodding your head

Question 17

While nodding your head, what is the Load, Fulcrum and Effort

Answer 17

Load - Weight of the head
Fulcrum - Neck joint
Effort- Muscles in neck

Question 18

3 sporting examples of first class levers

Answer 18

• Footballer moving their head forward to head the ball
  -A high jumper moving their head backwards to clear the bar
• A gymnast tucking their chine to their chest to roll forward

Question 19

An example of second class lever

Answer 19

Stepping up onto your toes

Question 20

While stepping on your toes, what is the Fulcrum, Load and Effort

Answer 20

Fulcrum - Toes
Load - weight of the body going through the the middle of the foot
Effort - Calf muscle

Question 21

3 sporting examples of the second class lever

Answer 21

• A diver on their tip toes on the board before their dive
• A ballet dancer, Going on their tip toes for a dance
  -A long jumper going up onto their tip toes as they take off

Question 22

Which lever has a mechanical disadvantage

Answer 22

Third class lever

Question 23

Whats the most common lever in the body

Answer 23

Third class lever

Question 24

An example of third class lever

Answer 24

Biceps curl

Question 25

While doing a biceps curl, what is the Load, Effort and fulcrum

Answer 25

Load - Weight or an object in hand Effort - Biceps contracting Load - Weight of object in hand

Question 26

What is a mechanical advantage

Answer 26

Moving a large output load with a small effort