Question
Which of these describes a normal reaction force? Air pushing against a moving object Two objects rubbing together A magnet attracting another magnet A surface pushing back on an object A rope pulling against an object
Answer
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Ffion
Professional · Tutor for 6 years
Answer
From the evaluation of those options, the "Normal Reaction Force" is best described by "A surface pushing back on an object."
Explanation
## Step 1: Understand the Concept of Normal Reaction ForceNewton's third law of motion tells us that every action has an equal and opposite reaction. This means if object A exerts a force on object B, object B exerts an equal and opposite force on A. A "Normal Reaction" force typically describes the perpendicular force could exert on an object through another solid surface. This force is often described as the 'push back' or resistance experienced when an object attempts to push into a surface. ## Step 2: Analyzing the ChoicesWe need to determine which among the scenarios presented represents a normal force reaction scenario. Let's go through each one.- Air pushing against a moving object: This would describe air resistance or drag, and not a normal reaction.- Two objects rubbing together: This describes frictional force, which is not the same as normal reaction.- A Magnet attracting another magnet: this describes magnetic force, which doesn't relate to the normal reaction force.- A surface pushing back on an object: this matches our description of a normal force – it highlights the force an object exerted on a surface and the 'push back' or resistance from the surface.- A rope pulling against an object: this is a force of tension rather than a normal reaction.