Which of the following forces are able to act from a distance?
I. Frictional force
II. Gravitational force
III. Magnetic force
IV. Electric force

Options

A. I and IV only
B. II and III only
C. I, II and III only
D. II, III and IV only

Explanation

To determine which of the following forces can act from a distance, we will analyze each force mentioned in the question:

1. **Frictional Force**:
- Frictional force occurs between two surfaces that are in contact with each other. It opposes the relative motion of the surfaces. Therefore, frictional force cannot act from a distance; it requires direct contact.
- **Conclusion**: Frictional force does not act from a distance.

2. **Gravitational Force**:
- Gravitational force is the attraction between two masses. It acts over a distance without the need for contact. For example, the Earth attracts an object towards it even when the object is in the air.
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