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Basic Physics
Linear momentum, impulse and collisions
Conservation of linear momentum

7. Linear momentum, impulse and collisions

Conservation of linear momentum

In 7. Linear momentum, impulse and collisions

Formula

\sum\vec p_i=\sum\vec p_f

Tags

collisions
physics
physics formula
momentum
momentum impulse collisions

Detail

The total initial linear momentum equals the total final linear momentum.

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Conditions

negligible net external impulse.

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Related formulas

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Perfectly inelastic 1D collision
$m_1v_{1i}+m_2v_{2i} =(m_1+m_2)v_f$
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Elastic collision
$m_1v_{1i}+m_2v_{2i} =m_1v_{1f}+m_2v_{2f}$
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