A fireman turns on a house and is knocked back which law is this
The law that describes this situation is Newton's Third Law of Motion, also known as the law of action and reaction. It states that for every action, there is an equal and opposite reaction. In this case, when the fireman turns on the hose with a force, the water exerts an equal and opposite force on the fireman, causing them to be knocked back.
The law that describes the situation you provided is Newton's Third Law of Motion, also known as the law of action and reaction. According to this law, for every action, there is an equal and opposite reaction. In this case, when the fireman turns on the hose, the force exerted by the water shooting out of the nozzle creates a reaction force that pushes the fireman back.
The law that explains why the fireman is knocked back when turning on a hose can be understood using Newton's third law of motion, also known as the law of action and reaction. According to this law, for every action, there is an equal and opposite reaction.
In this scenario, when the fireman turns on the hose, water is expelled from the hose with a certain force due to the pressure. According to Newton's third law, the water exerts an equal and opposite reaction force on the fireman. This force causes the fireman to be pushed backward or knocked back.
To summarize, the law involved here is Newton's third law of motion, which explains that every action has an equal and opposite reaction.