Question

a large force is applied to an object over a long period of time.

what is true about the momentum of the object?
there will be a large change in the momentum of the object.
the momentum of the object will not change.
there will be a small change in the momentum of the object.

Explanation:

This relies on the impulse-momentum theorem, which states that the impulse (force multiplied by time, $J = F \Delta t$) acting on an object equals the change in its momentum ($\Delta p = J$). A large force applied over a long time results in a large impulse, leading to a large change in momentum.

Answer:

There will be a large change in the momentum of the object.