Discussion Overview
The discussion revolves around whether weight force should be considered an apparent force, particularly in the context of a man standing on a rotating plate. Participants explore the implications of this question in both classical mechanics and general relativity, as well as the nature of inertial systems.
Discussion Character
- Debate/contested
- Conceptual clarification
- Technical explanation
Main Points Raised
- Some participants question if weight force is an apparent force, noting that in general relativity it is considered as such, while in classical mechanics it is not.
- There is agreement that centrifugal force is an apparent force on a rotating plate, but uncertainty remains about the treatment of weight force in this scenario.
- One participant suggests that when discussing approximately inertial systems, the Earth's rotation around the sun is a factor, but questions whether gravity plays a role in this classification.
- Another participant provides a technical detail regarding the centripetal acceleration due to Earth's rotation, indicating that it is relatively small compared to gravitational acceleration.
- Concerns are raised about the implications of apparent weight in practical applications, such as the calibration of scales used in commerce, which must account for centrifugal force.
Areas of Agreement / Disagreement
Participants express differing views on whether weight force is an apparent force, with some supporting its classification as such in general relativity and others opposing it in classical mechanics. The discussion remains unresolved regarding the treatment of weight force in rotating systems.
Contextual Notes
The discussion highlights limitations in understanding the nature of forces in rotating frames and the dependence on the definitions used in different physical theories. There are unresolved questions about the implications of Earth's rotation and gravity in defining inertial systems.