The Principle of Conservation of Momentum (Leaving Cert Physics): Flashcards

Total momentum before = total momentum after interaction

No, only transferred between objects

$m_1u_1 + m_2u_2 = m_1v_1 + m_2v_2$

No external forces acting on the system

Vector - direction matters

Don't change it, only redistribute between objects

Initial velocity (before collision)

Final velocity (after collision)

$m_1 + m_2$ (combined mass)

Often zero (object initially at rest)

Opposite directions

Use opposite signs (positive and negative)