The value of universal gravitational constant G depends upon :

Options

A. Nature of material of two bodies
B. Heat constant of two bodies
C. Acceleration of two bodies
D. None of these

Answer

To determine what the universal gravitational constant \( G \) depends upon, let's analyze the options provided and the nature of \( G \).

### Step-by-Step Solution:

1. **Understanding the Universal Gravitational Constant \( G \)**:
- The universal gravitational constant \( G \) is a fundamental physical constant that appears in Newton's law of universal gravitation. It quantifies the strength of the gravitational force between two masses.

2. **Newton's Law of Gravitation**:
- According to Newton's law, the gravitational force \( F \) between two masses \( m_1 \) and \( m_2 \) separated by a distance \( r \) is given by:
\[ F = \frac{G m_1 m_2}{r^2} \]
- Here, \( G \) is the proportionality constant that makes the equation dimensionally consistent and correct.

3. **Analyzing the Options**:
- The question provides several options regarding what \( G \) depends upon:
- A) Nature of material of the two bodies
- B) Heat constant of the two bodies
- C) Acceleration of the two bodies
- D) None of these

4. **Evaluating Each Option**:
- **Option A**: The nature of the material of the two bodies does not affect \( G \). It is a constant regardless of the materials involved.
- **Option B**: The heat constant of the two bodies is not relevant to the value of \( G \).
- **Option C**: The acceleration of the two bodies does not influence the value of \( G \).
- **Option D**: Since \( G \) is a universal constant, it does not depend on any of the factors mentioned in the other options.

5. **Conclusion**:
- Since \( G \) is a universal constant, the correct answer is:
\[ \text{D) None of these} \]