Soc 20 : Levers

Question 1

What is a lever ?

Answer 1

A lever refers to a system of muscles and bones working together to produce movement

Question 2

What is the fulcrum ?

Answer 2

The point around which the lever rotates (joints)

Question 3

What is the load ?

Answer 3

The force that is applied by a lever system (resistence/object)

Question 4

What is the effort ?

Answer 4

A force that is applied by the user of the lever system (muscles)

Question 5

What is the acronym to remeber thr different types of levers ?

Answer 5

First class = fulcrum in the middle
Second class = load is in the middle
Third class = effort is in the middle
FLE

Question 6

What is 2 examples of a first class lever

Answer 6

Tricep dips
Nodding your head

Question 7

What is 2 examples of a second class lever ?

Answer 7

Claf raises
Lifting a wheel barrow

Question 8

What is 2 examples of a third class lever ?

Answer 8

Bicep curl
Using a spade

Question 9

What is mechanical advantage and which levers have it ?

Answer 9

A large load can be lifted with small amount of effort
1st class lever and 2nd

Question 10

What is a mechanical disadvantage and what lever is it ?

Answer 10

Third class levers . They cant lift as heavy load with the same effort due to the positioning of the effort abs load from the fulcrum