Inertial Frames of Reference: Examining Forces & Acceleration

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SUMMARY

The discussion centers on the concept of inertial frames of reference in physics, specifically addressing misconceptions about their existence and the implications of acceleration and force. Participants clarify that while inertial frames are idealized constructs, they are essential for understanding motion. The key conclusions drawn are that a particle at rest in an inertial frame experiences zero net force, and that both inertial and non-inertial frames can yield different interpretations of force acting on a particle. The correct options regarding the nature of the frame and resultant forces are (1) and (2).

PREREQUISITES
  • Understanding of Newton's Laws of Motion
  • Familiarity with the concept of inertial and non-inertial frames
  • Basic knowledge of forces and acceleration
  • Ability to analyze physical scenarios using free-body diagrams
NEXT STEPS
  • Study the implications of Newton's First Law in inertial frames
  • Explore the differences between inertial and non-inertial frames in detail
  • Learn about fictitious forces in non-inertial frames
  • Investigate real-world applications of inertial frames in mechanics
USEFUL FOR

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

jay ambekar
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so here r ma doubts
=> it is sometimes heard tat inertial frame of referance is only an ideal concept and no such inertial frame exists.comment.

=>the accelaration of a particle is zero as measured from an inertial frame of referance . can we conclude tat no force acts on it?

=> a particle stays at rest as seen in a frame. we can conclude tat
1) the frame is inertal
2) resultant force on the particle is zero
3)the frame may be inertial but the resultant force on the particle is zero
4)the frame may be noninertial but there is a nonzero resultant force.
(two of the above options are correct. which r those n why?)

thnx in advance
 
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This sounds like your Homework. I am not going to do your homework for you.
 
im not asking u to solve anything...these r conceptual doubts
 
There are no 'doubts' in your question. What do you think the answers are?
 
amm...i have no idea abt the first two...i think the last one is (3) and (4)
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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