# Fundamental Forces: Explaining to a 13yo

• omega-centauri
In summary: EN.In summary, the four fundamental forces of nature are gravity, electromagnetism, strong nuclear force, and weak nuclear force. Other forces such as normal force, static friction, kinetic friction, and electromagnetic forces are derived from these four. Each force is responsible for different interactions between objects, from celestial bodies to particles on a microscopic level. While normal and friction forces are electromagnetic, they are also affected by gravity.

#### omega-centauri

How are the normal, static friction, kinetic friction, gravity, electrical and magnetic forces related to the four fundamental forces of nature? I have a 13 year old asking and I am not sure what to say! Any help is kindly appreciated.

Welcome to PF!

There are four fundamental forces:
-Gravity
-Electromagnetism
-Strong nuclear force
-Weak nuclear force.

You named two and the others you listed are derived from those two. Ie, friction (or any force from objects touching each other) comes from the electromagnetic force of repulsion of the electrons around atoms.

http://hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html

omega-centauri said:
How are the normal, static friction, kinetic friction, gravity, electrical and magnetic forces related to the four fundamental forces of nature? I have a 13 year old asking and I am not sure what to say! Any help is kindly appreciated.

" normal, static friction, kinetic friction, electrical and magnetic forces" - electromagnetic interaction/forces

"gravity" - gravitational interaction/forces.

zz.

Any force like u have mentioned comes under one of the four fundamental forces of nature .
The force can be categorized Depending on the objects responsible in generating the force .
Understanding the forces in simple terms ...
The force that acts between two celestial bodies like planets,stars is considered to be the fundamental weak gravitational force.
Like this the force that acts in the nucleus between two elementary particles (protons,neutrons) is strong nuclear force.
The forces like friction ,normal force ,centrifugal force,centripetal force...etc are forces which acts in different daily life situations are treated as electromagnetic forces.
The fourth fundamental force weak nuclear force is observed in nuclear radioactive decay processes.

Thanks so much for everyone's help!

Vphysics2013 said:
Any force like u have mentioned comes under one of the four fundamental forces of nature .
The force can be categorized Depending on the objects responsible in generating the force .
Understanding the forces in simple terms ...
The force that acts between two celestial bodies like planets,stars is considered to be the fundamental weak gravitational force.
Like this the force that acts in the nucleus between two elementary particles (protons,neutrons) is strong nuclear force.
The forces like friction ,normal force ,centrifugal force,centripetal force...etc are forces which acts in different daily life situations are treated as electromagnetic forces.
The fourth fundamental force weak nuclear force is observed in nuclear radioactive decay processes.
Just to add to this, while normal forces and friction forces are electromagnetic forces, they are related to gravity, which is a fundamental force. The normal force of the table on a box will be much greater on Earth than in space. So the friction forces (static and kinetic) will be as well.

AM

## What are fundamental forces?

Fundamental forces are the four basic interactions that govern the behavior of matter in the universe. They are gravity, electromagnetism, strong nuclear force, and weak nuclear force.

## How do these forces work?

Each fundamental force is carried by a specific type of particle and acts over a certain distance. Gravity, for example, is carried by gravitons and acts over long distances, while the strong nuclear force is carried by gluons and acts over very short distances within the nucleus of an atom.

## Why are these forces important?

These forces are important because they explain how particles interact with each other and how the universe works. Without them, matter would not be able to form, and the universe would not exist as we know it.

## Can these forces be observed?

Some of these forces, like gravity and electromagnetism, can be observed in our everyday lives. However, the strong and weak nuclear forces can only be observed using advanced equipment in particle accelerators.

## Are these forces related to each other?

Yes, these forces are related to each other through the unification of forces. Scientists are still working to understand how all four fundamental forces may be connected and possibly unified into one overarching theory.