Soc 20 Levers

Question 1

What is a lever?

Answer 1

In your body, the term ‘lever’ refers to a system of muscles and bones working together to bring about movement.

Question 2

What are the 4 main components of a Lever?

Answer 2

Fulcrum
Effort
Load
Lever Arm

Question 3

Give two examples of a First class lever?

Answer 3

Tricep dip and nodding your head.

Question 4

Give two examples of a second class lever?

Answer 4

Calf raiser and Lifting a wheelbarrow

Question 5

Give two examples of a Third class lever?

Answer 5

Bicep curl and using a spade

Question 6

Mechanical advantages

Answer 6

A large load can be lifted with a relatively
small amount of effort.

Question 7

Mechanical disadvantages

Answer 7

Third class levers cannot lift as heavy a load
with the same amount of effort, due to the position of the effort and load from the fulcrum.

Question 8

What is in the middle of a first class lever?

Answer 8

The Fulcrum

Question 9

What is in the middle of the second class lever?

Answer 9

The Load

Question 10

What is in the middle of a Third class lever?

Answer 10

The effort

Question 11

How are levers classified

Answer 11

Levers are classified according to the placement of the fulcrum, load and effort. This affect how the levers operates.

Question 12

How many different classes of levers are their?

Answer 12

Three