Question

A class __ lever never has a mechanical advantage.
A class __ lever always has a mechanical advantage.
A class __ lever could go either way.
Responses:
2; 1; 3

2; 3; 1

3; 2; 1

1; 2; 3

Answer 1

A lever is used to lift an object with a weight of 60 Newtons. The effort force is 15 meters from the fulcrum, while the load force is 5 meters from the fulcrum. What is the mechanical advantage?
Responses

4

75

3

12

Answer 2

The correct answer is: **3; 2; 1**.

- A class **3** lever (like a tweezers) never has a mechanical advantage because the effort is applied between the load and the fulcrum.
- A class **2** lever (like a wheelbarrow) always has a mechanical advantage because the load is between the effort and the fulcrum.
- A class **1** lever (like a seesaw) could go either way, depending on the positions of the load, effort, and fulcrum.