It causes an impulse, which results in a change in momentum of the object.

The total momentum remains constant (conservation of momentum).

The rocket experiences a thrust force in the opposite direction.

Linear Momentum: For objects moving in a straight line. | Angular Momentum: For rotating objects.

Elastic Collisions: Kinetic energy is conserved (objects bounce off each other). Momentum is always conserved. | Inelastic Collisions: Kinetic energy is NOT conserved (objects stick together or deform). Momentum is still conserved.

Momentum ($\vec{p}$) is a measure of how much 'oomph' an object has in its motion. It's the product of an object's mass (m) and its velocity ($\vec{v}$): $\vec{p} = m\vec{v}$

Impulse ($\vec{J}$) is the change in momentum of an object. It's also the product of the average force ($\vec{F}_{avg}$) acting on an object and the time interval ($\Delta t$) during which the force acts: $\vec{J} = \vec{F}_{avg} \Delta t = \Delta \vec{p}$

Linear momentum is the momentum of an object moving in a straight line.

Angular momentum is the momentum of a rotating object.

The impulse acting on an object equals the change in momentum of the object: $\vec{J} = \Delta \vec{p}$