Answer :
Both the hammer and the nail receive a force when the hammer hits the nail, as per Newton's third law of motion, which states there is an equal and opposite reaction for every action. The correct answer is A.
When you hit a nail with a hammer, the objects that receive a force are both the hammer and the nail. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. Therefore, when the hammer exerts a force on the nail to drive it into a surface, the nail exerts an equal and opposite force back onto the hammer.
This principle means that if you were to swing a hammer and hit a nail, both objects experience forces of equal magnitude but in opposite directions. It is a common misconception that only the nail receives a force, but in reality, the hammer is also acted upon by the nail during this interaction. The correct answer is A.