Here are the answers to your questions:
Question 1:
Answer: Force is a vector quantity that measures both direction and magnitude of a push or pull on an object.
Question 2:
Answer: The stationary soccer ball will begin moving downfield and the ball that struck it will slow down.
Question 3:
Answer: A car traveling northward with 5 kN of force could be brought to a stop by a southward force of 5 kN.
Question 4:
Answer: The acceleration and mass of an object.
Question 5:
Answer: The box exerts 10 N of force downward.
These answers adhere to the principles of physics regarding force, motion, and equilibrium. If you have more questions or need further clarifications, feel free to ask!