Conservation of Linear Momentum

The Law of Conservation of Linear Momentum states that the total linear momentum of a closed, isolated system remains constant if no net external force acts on it.
$\sum m_i(v_i{)}_1=\sum m_i(v_i{)}_2$

The equation above is derived from the linear impulse-momentum equation when the sum of external impulses acting on a system of objects is zero.

This equation is typically applied when particles collide or interact.

Internal forces do not impact the conservation of momentum equation as they always exists in equal and opposite pairs.

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