Question

how much momentum does a spaceship carrying rocks have?
it has less momentum than an empty spaceship traveling at the same velocity.
it has no momentum.
it has the same amount of momentum as an empty spaceship traveling at the same velocity.
it has more momentum than an empty spaceship traveling at the same velocity.

Explanation:

Momentum is calculated by the formula $p = mv$ (where $p$ is momentum, $m$ is mass and $v$ is velocity). A spaceship carrying rocks has greater mass than an empty one. With the same velocity, according to the formula, a greater - mass object has more momentum.

Answer:

It has more momentum than an empty spaceship traveling at the same velocity.