To find the final velocity of the block, you can use the formula for linear momentum:
p = m * v
where p is the momentum, m is the mass of the object, and v is the velocity.
Since the block starts from rest, its initial velocity is zero. The final velocity can be found by rearranging the equation to solve for v:
v = p / m
Plugging in the given values, you get:
v = (80.0 N * 5.0 m) / 5.0 kg = 16.0 m/s
So the final velocity of the block is 16.0 m/s.