Question

If L = load, F = fulcrum, and E = effort, what type of lever system is described as LEF?

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

Answer 1

Third-Class lever

Step-by-step explanation:

A lever system is categorized into three main classes based on the arrangement of the load (L), fulcrum (F), and effort (E). Here's what each class represents:

1. First-class lever: In this type of lever, the fulcrum is located between the load and the effort. The arrangement can be represented as FLE or ELF.

2. Second-class lever: In this type of lever, the load is between the fulcrum and the effort. The arrangement can be represented as LFE or ELF.

3. Third-class lever: In this type of lever, the effort is applied between the fulcrum and the load. The arrangement can be represented as LEF or FEL.

Based on your description of "LEF," it corresponds to a third-class lever where the effort (E) is applied between the load (L) and the fulcrum (F). So, the correct answer is a "third-class lever."