Reduces the force experienced by the objects involved, given the impulse remains the same.

Increases the impulse and thus the change in momentum of the object.

The total momentum remains constant; it is conserved.

It is a perfectly inelastic collision, and kinetic energy is not conserved.

External forces prevent the conservation of momentum within the system.

Measure of an object's motion, combining mass and velocity. $\vec{p} = m\vec{v}$

$\vec{p} = m\vec{v}$ where $\vec{p}$ is momentum (kg⋅m/s), $m$ is mass (kg), and $\vec{v}$ is velocity (m/s).

kilogram-meters per second (kg⋅m/s)

A collision where both momentum and kinetic energy are conserved.

A collision where momentum is conserved, but kinetic energy is not. Some energy is lost to heat, sound, etc.

Elastic: Kinetic energy is conserved. Inelastic: Kinetic energy is not conserved, often converted to heat/sound.

Total momentum before a collision equals total momentum after a collision (conservation of momentum).

Total kinetic energy before an elastic collision equals total kinetic energy after the collision.

Total kinetic energy before an inelastic collision is greater than the total kinetic energy after the collision. Kinetic energy is lost to other forms of energy.

Positive momentum: motion to the right or upwards. Negative momentum: motion to the left or downwards.