non-contact force
Definition
A non-contact force is a force that can be exerted on an object without touching it. Some examples of non-contact forces include:
- Gravity: Gravity is the force that pulls objects towards each other. It is the force that keeps us on the ground and the planets in orbit around the sun.
- Magnetism: Magnets can attract or repel each other without touching. This is because magnets have a force called magnetism.
- Electricity: Electricity can also create a non-contact force. This is because electric charges can attract or repel each other.
How can the word be used?
The gravitational force is a non-contact force that attracts two objects with mass towards each other.
Different forms of the word
The word "non-contact force" does not have any different forms. It is a compound word that is made up of the prefix "non-," which means "not," and the noun "contact force," which means a force that acts between two objects that are in contact with each other.
Etymology
The word "non-contact force" was first used in the early 20th century. It was used to describe forces that were not understood at the time. However, scientists have since learned a great deal about non-contact forces, and they now play an important role in our understanding of the universe.
Question
What is a non-contact force?