A force that acts on an object without touching it is called a non-contact force.

Here are some examples of non-contact forces:

* Gravity: The force that pulls objects towards each other. This is what keeps us on the ground and what causes the moon to orbit the Earth.

* Electromagnetism: This force involves interactions between electrically charged particles and magnetic fields. It's responsible for things like electricity, magnetism, and light.

* Nuclear forces: These forces hold the nucleus of an atom together. They are extremely strong but act over very short distances.

Let me know if you want to learn more about any of these non-contact forces!