What Forces are at Play on a Rock Sinking at Constant Speed in Water?

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Discussion Overview

The discussion revolves around the forces acting on a rock that is sinking in water at a constant speed. Participants explore the concepts of gravity, water resistance, and buoyancy, questioning their roles and interactions in this scenario.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • Some participants propose that the forces acting on the rock include gravity and water resistance.
  • Others argue that buoyancy should also be considered, as suggested by a physics book, leading to a total of three forces.
  • A participant expresses confusion about how buoyancy operates in this specific situation and seeks clarification.
  • Another participant references a general model of buoyancy, suggesting that its principles are consistent across different scenarios.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the number of forces acting on the rock, with differing views on the inclusion of buoyancy. The discussion remains unresolved regarding the understanding of buoyancy in this context.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about the forces and the definitions of buoyancy, which may not be fully explored or agreed upon.

johann1301
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If a rock is sinking in water with constant speed..

how many forces are working on it?
 
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johann1301 said:
If a rock is sinking in water with constant speed..

how many forces are working on it?

What are *your* thoughts? What is the context of your question?
 
my thoughts are that there are only two; gravity and water resistance, but my physics book says its three; gravity, water resistance AND buoyancy. i don't understand how buoyancy works in this situation... anyone?
 

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