Question

After a long night of cramming for a test, your college roommate hits his head forcefully against the wall of your room in despair. According to Newton 3d Law, as he exerts a force against the wall, there must be an equal and opposite force. How does that opposite force show itself in its case?

Answer 1

In response to your roommate hitting his head against the wall, Newton's third law ensures that the wall exerts an equal and opposite force onto his head, resulting in the impact he feels.

Step-by-step explanation:

According to Newton's third law of motion, whenever one object exerts a force on a second object, there is an equal and opposite reaction force exerted by the second object on the first. In the case of your roommate who forcefully hits his head against the wall, the wall exerts an equal and opposite force on his head. This opposite force manifests as the feeling of impact he experiences on his head, which might lead to discomfort or even pain, depending on the force's intensity. Essentially, the force applied by your roommate's head to the wall is matched by an equal force from the wall back onto his head, but this does not result in cancelling out effects since they each act on different systems - the wall and your roommate's head respectively.

Answer 2

See the answer below

Step-by-step explanation:

Newton's third law states that for every action, there will always be an opposing reaction of equal magnitude to the action.

Hence, the wall will exert an equal opposing force to the head and the roommate will feel this opposing force as pains and/or headache.