Moment of force is ................ proportional to the distance of point of application of force and fulcrum.

Options

A. inversely
B. directly
C. not
D. none of these

Explanation

To solve the question, we need to understand the concept of the moment of force (also known as torque) and how it relates to the distance between the point of application of the force and the fulcrum.

### Step-by-Step Solution:

1. **Understanding Moment of Force**:
The moment of force (or torque) is defined as the measure of the force causing an object to rotate about an axis (fulcrum). It is calculated using the formula:
\[ \text{Moment of Force} = r \times F \]
where \( r \) is the distance from the fulcrum to the point of application of the force, and \( F \) is the magnitude of the force applied.

2. **Identifying the Relationship**:
From the formula, we can see that the moment of force depends on the distance \( r \). If the distance \( r \) increases while the force \( F \) remains constant, the moment of force will also increase. This indicates a direct relationship.

3. **Conclusion**:
Therefore, we can conclude that the moment of force is **directly proportional** to the distance of the point of application of the force from the fulcrum.

4. **Final Answer**:
The correct option to fill in the blank is: **directly proportional**.