a fire man turns on his hose and is knocked backwards, is this newtons 1st law 2nd law or third
This situation can be explained by Newton's Third Law of Motion. According to Newton's third law, for every action, there is an equal and opposite reaction. When the fireman turns on the hose, the water exerts a force pushing in one direction, and as a result, an equal and opposite force is exerted on the fireman, causing him to be knocked backwards.
This situation can be explained using Newton's 2nd law of motion. Newton's 1st law states that an object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an external force. Newton's 3rd law states that for every action, there is an equal and opposite reaction.
However, in the given scenario, the fireman turns on the hose and is knocked backwards. This can be explained by Newton's 2nd law, which states that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. When the fireman turns on the hose, water is forced out of the hose with a certain force. According to Newton's 2nd law, an equal and opposite reaction force is exerted on the fireman, causing him to be knocked backwards.
To determine if this scenario represents Newton's first, second, or third law of motion, we need to analyze the situation.
Newton's first law of motion, also known as the law of inertia, states that an object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an external force. In other words, an object will only accelerate if there is a net force acting on it.
Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it, and inversely proportional to its mass. This can be represented by the equation F = ma (force = mass × acceleration).
Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that if an object exerts a force on another object, the second object will exert an equal force in the opposite direction on the first object.
In the given scenario, when the fireman turns on the hose and is knocked backward, it is due to an equal and opposite reaction force caused by the water coming out of the hose. This aligns with Newton's third law of motion. As the water moves forward, the fireman experiences a backward force, causing him to be pushed in the opposite direction.
Therefore, the correct answer is that this scenario represents Newton's third law of motion.