# Mechanics - Friction

> Source: https://ollybritton.com/notes/a-level/maths/topics/mechanics/friction/ · Updated: 2021-11-20 · Tags: school, mechanics, maths, year-2

## Flashcards
### 2021-11-20
##### What is the formula for the maximum friction??
$$
F_\text{max} = \mu R
$$

##### What is $\mu$ when talking about friction??
The coefficient of friction.

##### What is $\mu$ if a surface is described as "smooth"??
$$
0
$$

##### If a block is being pushed with a $10\text{N}$ force but there is a $20\text{N}$ max friction, what will happen??
The block will not move.

##### What is the situation called when a block is being pushed with a $20\text{N}$ force but there is a $20\text{N}$ max friction??
A limiting equilibrium, the block will not move.

##### If a block is being pushed with a $30\text{N}$ force but there is a $20\text{N}$ max friction, what will happen??
The block will move with a $10\text{N}$ force.

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