Question

Study the diagram alongside and answer the following questions:

1. What kind of lever is shown in diagram?
2. Derive ideal mechanical advantage of this lever.
3. Give two examples of this lever.

Answer 1

a. It is a Class I lever (or first-order lever).

The fulcrum (F) is located in the middle, between the load (L) and the effort (E).

b. According to the Principle of Levers:

Load (L) × Load Arm (FB) = Effort (E) × Effort Arm (FA)

\[ \frac{L}{E} = \frac{FA}{FB} \]

Since Mechanical Advantage (M.A.) is defined as \[ \frac{\text{Load}}{\text{Effort}} \]:

\[ \text{Ideal M.A.} = \frac{\text{Effort Arm } ({FA})}{\text{Load Arm } ({FB})} \]

c. Two examples are a seesaw and a crowbar.