Soc20 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 too bring about a movement

Question 2

What are the 4 parts involved in a lever called?

Answer 2

• Fulcrum
• Load
• Effort
• Lever arm

Question 3

When drawing a diagram of a lever what does the: square, triangle, arrow and long rectangle represent?

Answer 3

Square = Load
Triangle = Fulcrum
Arrow = Effort
Long rectangle = Lever arm

Question 4

What are the 3 different types of levers?

Answer 4

• First class levers
• Second class levers
• Third class levers

Question 5

What is a first class lever?

Answer 5

A lever where the fulcrum is in the middle

Question 6

What is a second class lever?

Answer 6

A lever where the load is in the middle

Question 7

What is a third class lever?

Answer 7

A lever where the effort is in the middle

Question 8

What are 2 examples of first class levers?

Answer 8

• Tricep dips
• Nodding your head

Question 9

What are 2 examples of second class levers?

Answer 9

• Calf raises
• Lifting a wheelbarrow

Question 10

What are 2 examples of third class levers?

Answer 10

• A bicep curl
• Using a spade

Question 11

What is a mechanical advantage?

Answer 11

A lever that can lift a large load with a relatively small amount of effort

Question 12

What is a mechanical disadvantage?

Answer 12

A third class lever that cannot lift as heavy of a load with the same amount of effort as a different lever