Some small questions grouped together

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SUMMARY

The discussion centers on the nature of motion and reference frames in physics. It confirms that a particle can describe a curved path without an acting force if observed from a non-inertial reference frame, where pseudo forces may be considered. The participants agree that inertial frames are idealized concepts, as practical scenarios often involve absolute acceleration. Lastly, it is asserted that a reference frame far from all forces can be considered inertial, although confidence in this assertion varies among participants.

PREREQUISITES
  • Understanding of Newtonian mechanics
  • Familiarity with inertial and non-inertial reference frames
  • Knowledge of pseudo forces and their implications
  • Basic concepts of absolute acceleration
NEXT STEPS
  • Study the implications of pseudo forces in non-inertial frames
  • Explore the concept of inertial frames in classical mechanics
  • Investigate the relationship between acceleration and reference frames
  • Review advanced topics in general relativity regarding curved spacetime
USEFUL FOR

Students of physics, educators teaching mechanics, and anyone interested in the foundational concepts of motion and reference frames.

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Homework Statement


1. Is it possible for a particle to describe a curved path if no force acts on it? Is the answer reference frame dependent?
YES, when the body stays still but the frame describes a curved path. Then with respect to that frame the body will describe curves but no force would act on particle. Will we count pseudo force as a force?

2. It is sometimes heard that inertial frame of reference does not actually exists and is only an ideal concept. Comment.
I totally agree with the view. almost every thing practical has absolute acceleration. Ar my views compatible?

3. An object is placed far away from all objects that can exert force on it. A reference frame is taken by taking the origin and axes fix in this. Will th frame be necessarily inertial?
I think yes. But I am not very confident.
 
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ritwik06 said:

Homework Statement


1. Is it possible for a particle to describe a curved path if no force acts on it? Is the answer reference frame dependent?
YES, when the body stays still but the frame describes a curved path. Then with respect to that frame the body will describe curves but no force would act on particle. Will we count pseudo force as a force?

2. It is sometimes heard that inertial frame of reference does not actually exists and is only an ideal concept. Comment.
I totally agree with the view. almost every thing practical has absolute acceleration. Ar my views compatible?

3. An object is placed far away from all objects that can exert force on it. A reference frame is taken by taking the origin and axes fix in this. Will th frame be necessarily inertial?
I think yes. But I am not very confident.

Why aren't my questions answered?
As you can see, I have put on what I think is right. Do I need to do something more, in order that I get some help?
 

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