* Gravity: The Earth pulls on objects near its surface, causing them to fall. This force acts at a distance and doesn't require direct contact.
* Magnetism: Magnets exert forces on each other and on ferromagnetic materials even when they are not in contact.
* Electrostatic Force: Charged objects can exert forces on each other even when they are not touching.
* Electromagnetic radiation: Light and other forms of electromagnetic radiation carry energy and can exert pressure on objects, even if they are not directly touching.
How does this work?
Non-contact forces are mediated by fields. A field is a region of space where a force can be exerted. For example, the Earth has a gravitational field that extends outward from its center. Objects within this field experience a force of gravity.
In a field, it's all about the field. Objects don't need to touch each other directly for forces to act on them. The field itself acts as the intermediary, carrying the force between the objects.
