Answer:

Explanation:
From Newton's 2nd Law, we have
. We can use this to find the acceleration of object after 20 N (force) is applied to the 10 kg object.
Substituting given values, we have:

Now that we have acceleration, we can find the final velocity of object (after 0.5 seconds) using the following kinematics equation:
, where
is final velocity,
is initial velocity,
is acceleration, and
is time.
Solving for final velocity:

The momentum of an object is given as
. Since we've found the final velocity and mass stays constant, we have:
