SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the hose material is very realistic
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since the hose is at rest, it tends to stay at rest
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the force exerted on the water equals the mass of the water times its acceleration
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the escaping water exerts an equal and opposite force on the hose
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Detailed explanation-1: -Newton’s third law of motion states that every action has an equal and opposite reaction. Hosepipes eject a large amount of water at a high velocity. There’s a backward reaction force due to the water rushing out.
Detailed explanation-2: -A firefighter feels the hose pushing backwards onto him as he uses it to put out a fire. What is the most likely cause of this? The escaping water exerts an equal and opposite force on the hose.
Detailed explanation-3: -The answer is “a fireman turns on a hose and is knocked backwards” because the force of the water going out of the hose is equal and opposite to the force pushing backwards on the fireman. Newton’s 1st Law: The law of inertia. Inertia is an objects tendency to resist changes in motion.
Detailed explanation-4: -See Newton’s first law of motion. When there is a net force on an object, it causes the object to accelerate in the direction of the net force; this is not the same as the direction of the motion unless the object is going in a straight line.
Detailed explanation-5: -Air resistance (also called drag) is a type of frictional force. Like all frictional forces, the force of air resistance always opposes the motion of an object.