The universal law of gravitational is the force law known also as the

Options

A. triangular law
B. square law
C. inverse square law
D. parallelogram law

Explanation

To solve the question regarding the universal law of gravitation, we need to identify what this law is commonly known as.

### Step-by-Step Solution:

1. **Understanding the Universal Law of Gravitation**:
The universal law of gravitation states that every point mass attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

2. **Mathematical Representation**:
The law can be mathematically expressed as:
\[ F = G \frac{m_1 m_2}{r^2} \]
where:
- \( F \) is the gravitational force between the two masses,
- \( G \) is the gravitational constant,
- \( m_1 \) and \( m_2 \) are the masses of the two objects,
- \( r \) is the distance between the centers of the two masses.

3. **Identifying the Type of Law**:
From the equation, we can see that the force \( F \) is inversely proportional to the square of the distance \( r \). This means that as the distance increases, the force decreases rapidly.

4. **Conclusion**:
The universal law of gravitation is also known as the **Inverse Square Law**. This term is used because the force of gravity decreases with the square of the distance between two masses.

### Final Answer:
The universal law of gravitation is also known as the **Inverse Square Law**.