Which of these forces mandatorily requires a physical contact between two bodies?

Options

A. Magnetic force
B. Muscular force
C. Electrostatic force
D. Gravitational force

Answer

To determine which of the given forces requires physical contact between two bodies, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Forces**: The forces we need to evaluate are:
- Magnetic Force
- Muscular Force
- Electrostatic Force
- Gravitational Force

2. **Analyze Magnetic Force**:
- Magnetic force acts between magnets.
- It can attract or repel without physical contact, as the force exists in the magnetic field around the magnets.
- **Conclusion**: Magnetic force does not require physical contact.

3. **Analyze Electrostatic Force**:
- Electrostatic force acts between charged particles (like electrons).
- This force can also act over a distance, meaning it can exert influence without direct contact.
- **Conclusion**: Electrostatic force does not require physical contact.

4. **Analyze Gravitational Force**:
- Gravitational force acts between masses (like the Earth and an object).
- It pulls objects towards each other even when they are not in contact (e.g., a falling apple).
- **Conclusion**: Gravitational force does not require physical contact.

5. **Analyze Muscular Force**:
- Muscular force is generated by the contraction of muscles.
- It requires direct physical contact to exert force on an object (e.g., lifting a bucket).
- **Conclusion**: Muscular force requires physical contact.

6. **Final Conclusion**:
- Among the forces listed, only muscular force mandatorily requires physical contact between two bodies.

### Answer:
The force that mandatorily requires physical contact between two bodies is **Muscular Force**.

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