Linear Momentum

Table Of Contents

Linear Momentum

Formula

$\overrightarrow{p}=m\overrightarrow{v}$

SI Units

$\frac{kgm}{s}$

Conservation of Linear Momentum

Following the Conservation of Energy, The total momentum of a system remains constant in all points of time if:

• No external or unbalanced forces are acting on the objects
• The object has $\overrightarrow{a}=0$ and ${\overrightarrow{F}}_{net}=0$ This means that:

Momentum Collision

2+ Objects in collision

• Total initial Momentum = Total final Momentum
• Total system’s Impulse = 0

Formulas

$p_1+p_2+p_3+\cdots =p_1^{\prime }+p_2^{\prime }+p_3^{\prime }+\dots$

Types of Collisions

Head On

Glancing

Recoil

Recoil as a concept exists because the momentum before shot must equal the momentum after shot. So when a object has forward momentum, it must be counteracted somehow. The gun gains backwards momentum as a result.