# Friction Calculator

Our friction calculator allows you to effortlessly **obtain the friction coefficient and its associated force acting on an object**.

In this calculator, we will describe:

- What friction is;
- Static and kinetic friction formulas and definition;
- Force of friction equation; and
- How to find the coefficient of friction

Stay put while we explain all you need to know about this classical mechanics topic ⚙.

## What is friction? Static and kinetic friction

Let's take a look at some definitions before you start using our friction calculator.

Friction is a force that *opposes the relative motion between two objects or surfaces.*

When we refer to the interaction between two solid objects, we can differentiate two types of friction: **static** and **kinetic** friction.

### Static friction

**Static friction** is the force that *prevents an object from moving when we apply a force to it.* For example, if we apply a small amount of force to a heavy piece of furniture 📦, **it will remain in its place**.

After a certain amount of force is applied, the static friction *breaks*, and the object begins to move under **kinetic friction**.

### Kinetic friction

**Kinetic friction**, on the other hand, acts on moving surfaces (relative to each other) and opposes the direction of movement. Without kinetic friction, nothing would prevent an object from sliding forever ⛸.

🙋 If you already know everything there is to know about friction, skip ahead and start using our friction calculator right away!

## Static and kinetic friction formulas

The force of friction equation is similar, and it depends on the normal force in both cases:

this is the **static friction force equation**, where:

- $\mu_{s}$ is the
**coefficient of static friction**(measured at the**maximum**applied force before the object starts moving); and - $N$ the normal force acting on the body.

Similarly, the kinetic friction force formula is:

where, again, $N$ is the normal force, and $\mu_{k}$ is the kinetic friction coefficient.

✅ You can find either the **friction force**, **normal force**, or **friction coefficient** with our friction calculator! Simply input any two parameters, and our tool will do the rest.

## How to find the coefficient of friction

You can also find both coefficients of friction manually. To do this, you simply need to divide the friction force $f$ by the normal force.

❓ Of course, finding this friction force might be difficult, and it entirely depends on the problem you're trying to solve.

*F = μN*