Is Everyday Experience Inconsistent with Newton's First Law?

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SUMMARY

The discussion centers on the apparent contradiction between Newton's First Law of Motion and everyday experiences, particularly the tendency of moving objects to come to rest. Participants clarify that Newton's First Law states an object will maintain constant velocity unless acted upon by an external force. They argue that everyday experiences often involve friction and air resistance, which are forces that affect motion, thus aligning with Newton's principles. Additionally, examples such as the Earth's consistent rotation and the moon's stable orbit illustrate that these phenomena do not contradict Newton's First Law.

PREREQUISITES
  • Understanding of Newton's First Law of Motion
  • Basic knowledge of forces, including friction and air resistance
  • Familiarity with concepts of motion and velocity
  • Awareness of celestial mechanics, such as Earth's rotation and orbit
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  • Research the implications of Newton's First Law in real-world scenarios
  • Explore the role of friction and air resistance in motion
  • Study Galileo's contributions to classical mechanics
  • Investigate the principles of celestial mechanics and orbital motion
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Students studying physics, educators teaching classical mechanics, and anyone interested in understanding the relationship between theoretical laws of motion and practical experiences.

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For one of my homework questions, I need to ask 2 to 3 people a question regarding Newton, then write an essay on it.

Newton's First Law states that an object will move with a constant velocity if nothing acts on it (but I'm sure you all knew that). This seems to contradict our everyday experience that a moving object comes to a rest unless something acts to keep it going. Does this everyday experience contradict Newton's First Law? If it does not, explain how this experience is consistent with Newton's First Law. If it does, explain why we bother to teach Newton's First Law anyways.
This may be easy for some of you, it was for me, but I'm supposed to ask so any different variety of answers would be appreciated. :smile:
 
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physics newb said:
For one of my homework questions, I need to ask 2 to 3 people a question regarding Newton, then write an essay on it.

Newton's First Law states that an object will move with a constant velocity if nothing acts on it (but I'm sure you all knew that). This seems to contradict our everyday experience that a moving object comes to a rest unless something acts to keep it going.
It depends on what you mean by everyday experience. Every day seems to be the same length, so I am aware that the Earth continues to rotate at the same speed. It does not slow down at all. Every year, the seasons occur at about the same time and every year has the same number of days. This tells me that the Earth is not slowing down as it orbits the sun. I see the moon in the sky and I don't see any changes to the moon's period of rotation. So I don't see my every day experience contradicting Newton's first law (which is actually Galileo's, I think).

AM
 
physics newb said:
This seems to contradict our everyday experience that a moving object comes to a rest unless something acts to keep it going.
Everyday experience almost always includes fricton and/or air resistance. Those are forces acting upon the object.

But anyone who's dropped a penny on the ground knows how far it can roll without slowing down.
 

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