Your explanation is just WRONG. Please understand Newton’s Third Law before spewing your ignorance around, confusing others, because they take you as an authority:
“…It applies a force due to its weight. According to Newton’s third law of motion, the surface responds by applying an equal and opposite force on the object. ”
No! In your example, Newton’s 3rd law refers to the earth gravitationally attracting the object (action) and the object gravitationally attracting the earch (reaction). You are confusing Newton’s 3rd law with a “statics” problem in which the Normal force counteracts the gravitational force so that the net vertical force acting on the object is zero. Action-reaction pairs must always be the same kind of force. That clearly doesn’t apply here since the Normal force is a contact force and gravitational attraction is not.
You are publishing what is probably the Number One misconception about Newton’s third law made by beginning physics students. So you’re making that misconception worse.
