Frame of reference and Newton's third law

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SUMMARY

The discussion confirms that Newton's third law remains valid in a rotating frame of reference, despite the presence of fictitious forces such as mv^2/r. Participants assert that the law, which states that for every action there is an equal and opposite reaction, holds true regardless of whether the frame is inertial or non-inertial. The introduction of fictitious forces does not alter the fundamental interactions between objects, ensuring that the forces remain equal and opposite.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with concepts of inertial and non-inertial frames of reference
  • Basic knowledge of fictitious forces in physics
  • Comprehension of vector forces and their interactions
NEXT STEPS
  • Study the implications of fictitious forces in non-inertial frames
  • Explore advanced applications of Newton's laws in rotating systems
  • Learn about the mathematical formulation of fictitious forces
  • Investigate real-world examples of Newton's laws in rotating frames, such as in centrifuges
USEFUL FOR

Students of physics, educators teaching mechanics, and professionals in engineering fields who require a solid understanding of motion dynamics in various frames of reference.

wikidrox
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I can not find the answer for this

In a rotating frame of reference, Newton's first and second laws remain valid if we assume that a fictitious force equal to mv^2/r is acting. What effect does this assumption have on the validity of Newton's 3rd law?
 
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wikidrox said:
I can not find the answer for this

In a rotating frame of reference, Newton's first and second laws remain valid if we assume that a fictitious force equal to mv^2/r is acting. What effect does this assumption have on the validity of Newton's 3rd law?

What do you think the effect is? If you always have to add a force to anything that's happening?
 


The assumption of a fictitious force in a rotating frame of reference does not affect the validity of Newton's third law. This law states that for every action, there is an equal and opposite reaction. In other words, when one object exerts a force on another object, the second object exerts an equal and opposite force on the first object.

This remains true even in a rotating frame of reference, where the fictitious force may be present. The forces between objects in a system are still equal and opposite, regardless of the frame of reference. Therefore, Newton's third law remains valid in both inertial and non-inertial frames of reference.
 

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