Topic 1 - Levers and Inclined Planes

Question 1

What is a Lever?

Answer 1

• a simple machine to help us do work
• a rod resting on a a pivot (fulcrum)

Question 2

What is a fulcrum

Answer 2

• the pivot the rod rests on

Question 3

What is the Effort Arm?

Answer 3

• the distance between the fulcrum and effort force
• the longer the effort arm = the less force needed

Question 4

What is the Load Arm?

Answer 4

• The distance between the fulcrum and the load

Question 5

Class One Lever

Answer 5

• Fulcrum is in the middle
• Power Advantage
  Ex. see saw, car jack

Question 6

Class Two Lever

Answer 6

• Load is in the middle
  Ex. wheelbarrow, door

Question 7

Class Three Lever

Answer 7

• Effort is in the middle
• Speed Advantage
  Ex. badminton racket, knife, arm