The point at which the total mass of a system is considered concentrated.

The product of an object's mass and velocity: $p = mv$.

The change in momentum of an object: $J = \Delta p = F\Delta t$.

A collision where both momentum and kinetic energy are conserved.

A collision where momentum is conserved, but kinetic energy is not.

A collision where objects stick together after impact.

Use the formula: $x_{cm} = \frac{\sum m_i x_i}{\sum m_i}$, where $m_i$ is the mass of the i-th particle and $x_i$ is its position.

The impulse on an object is equal to the change in its momentum: $J = \Delta p$.

Set the total initial momentum equal to the total final momentum: $\sum p_{initial} = \sum p_{final}$.

It causes a change in the object's momentum.

The total momentum of the system remains constant (Law of Conservation of Momentum).

The colliding objects stick together and move as one mass, with kinetic energy not conserved.