## Formulas worksheet

Here is a full formulary by subject Newton's laws of motion. By understanding each equation, you will be able to solve any problem that you may find at this level.

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### Resultant Force of a System of Forces

#### Resultant force of a concurrent system of forces

${\sum }_{}\stackrel{\to }{F}=\stackrel{\to }{{F}_{1}}+\stackrel{\to }{{F}_{2}}+\stackrel{\to }{{F}_{3}}+...+\stackrel{\to }{{F}_{n}}$

### Linear Momentum

#### Linear Momentum

$\stackrel{\to }{p}=m·\stackrel{\to }{v}$

#### Linear Momentum of a Particles System

$\stackrel{\to }{p}={\stackrel{\to }{p}}_{1}+{\stackrel{\to }{p}}_{2}+...+{\stackrel{\to }{p}}_{n}$

### Newton´s First Law

#### Newton´s first law

$\sum F=0⇔\frac{dv}{dt}=0$

### Newton´s Second Law

#### Speed of linear momentum variation

$\sum _{}\stackrel{\to }{F}=\frac{\Delta \stackrel{\to }{p}}{\Delta t}$

#### Newton ́s second law magnitude. Unchanged mass

$F=m·a$

### Newton´s Third Law

#### Newton´s Third Law

$\stackrel{\to }{{F}_{AB}}=-\stackrel{\to }{{F}_{BA}}\phantom{\rule{0ex}{0ex}}{F}_{AB}={F}_{BA}$