Soc 20: Levers

Question 1

Lever

Answer 1

Refers to a system of muscles and bones working together to bring about movement

Question 2

Fulcrum

Answer 2

1st class
The point around which the lever rotates
(Joints)

Question 3

Load

Answer 3

2nd class
The force that is applied by the lever system.
The load is the object you want to move a dumbell with you arm
(Weight)

Question 4

Effort

Answer 4

3rd class
A force that is applied by the user of the lever system.
(Muscle)

Question 5

First class lever

Answer 5

Fulcrum in the MIDDLE

Question 6

Second class lever

Answer 6

Load in the MIDDLE

Question 7

Third class lever

Answer 7

Effort in the MIDDLE

Question 8

Example of a first class lever

Answer 8

An example can be nodding your head.
Another can be a tricep dip
Or elbow extension

Question 9

Example of a second class lever

Answer 9

An example can be a calf raise

Question 10

Example of a third class lever

Answer 10

An example can be a bicep curl

Question 11

Mechanical advantage

Answer 11

When the output of the lever is greater then the input of the lever - that is when the load is greater then the efforr so you get more out than you are putting in

Question 12

Mechanical disadvantage

Answer 12

Opposite of a mechanical advantage, happens when the effort load are on the same side of the fulcrum but the effort sits ckoser to the fulcrum than the load does