1. Which class of lever is used in a fishing rod?

first-class lever
second-class lever
third-class lever
fourth-class lever

2. Which class of lever is used in a see-saw?

first-class lever
second-class lever
third-class lever
fourth-class lever

3. Which class of lever is useful for opening containers?

first-class lever
second-class lever
third-class lever
fourth-class lever

4. Which class of lever is useful for throwing things?

first-class lever
second-class lever
third-class lever
fourth-class lever

5. Which of the following is a part of a lever?

incline
spring
fulcrum
wheel

6. Which of the following things is not a part of the lever?

load
circuit
fulcrum
force