Question

A class _ lever never has a mechanical advantage.
A class
lever always has a mechanical advantage.
A class
lever could go either way. (1 point)
03;2;1
02;3;1
01;2;3
• 2; 1; 3
Question 2
A) 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? (1 point)
03
04
075
• 12

Answer 1

To address your two questions:

**Question 1:**
Regarding the mechanical advantage of a lever, it depends on the class of the lever (Class 1, Class 2, or Class 3):

- **Class 1 Lever:** The fulcrum is between the effort and the load. This class can have a mechanical advantage greater than, equal to, or less than 1, depending on the distances from the fulcrum to the effort and load.
- **Class 2 Lever:** The load is between the effort and the fulcrum. This type of lever always has a mechanical advantage greater than 1.
- **Class 3 Lever:** The effort is between the load and the fulcrum. This lever typically has a mechanical advantage less than 1.

Thus, the correct categorization would be:
- Class 1 lever: Could go either way.
- Class 2 lever: Always has a mechanical advantage.
- Class 3 lever: Never has a mechanical advantage.

**Answer:** 03; 2; 1 (Class 1: Could go either way; Class 2: Always has a mechanical advantage; Class 3: Never has a mechanical advantage)

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**Question 2:**
To calculate the mechanical advantage (MA) of a lever, you can use the formula:

\[ \text{Mechanical Advantage (MA)} = \frac{\text{Distance from Fulcrum to Effort (d_e)}}{\text{Distance from Fulcrum to Load (d_l)}} \]

Given:
- Distance from fulcrum to effort (d_e) = 15 meters
- Distance from fulcrum to load (d_l) = 5 meters

Now, plug in the values:

\[ \text{MA} = \frac{15 \text{ m}}{5 \text{ m}} = 3 \]

**Answer:** 03 (The mechanical advantage is 3.)