A 2.0kg object is moving at 3 m/s. A

4-N force is applied in the direction of motion and then removed after the object has traveled an additional 5m. The work done by this force is.

Would the answer be simply:
W=F*d= (4* 5m)= 20N and you only take the information concerning that force.
Thank you

That is it. Work is force * distance.