Work Done on Stone: 0 Kinetic Energy Change

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Homework Help Overview

The problem involves a stone with a mass of 2.5 kg that is submerged in a liquid, moving at a constant speed of 2 m/s over a distance of 80 cm. The focus is on determining the work done on the stone in relation to its kinetic energy.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • One participant suggests that the work done is zero due to no change in kinetic energy, while another notes that the stone is moving at terminal velocity, implying that the net force acting on it is zero and thus the work done is also zero.

Discussion Status

The discussion includes various interpretations of the problem, with participants exploring the implications of constant speed and terminal velocity on the work done. There is no explicit consensus, but the reasoning around kinetic energy and forces is being examined.

Contextual Notes

One participant expressed concern about posting in the wrong section, indicating a potential distraction from the main discussion on the physics problem.

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Homework Statement


A stone has mass 2.5 kg is placed in a liquid. It falls with constant speed 2 ms-1 and travels 80 cm. Find the work done


Homework Equations


W = delta Ek


The Attempt at a Solution


The work done = 0 because there is no change in kinetic energy. Am I right?

Thanks
 
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Oh my god..I'm so sorry I've posted oin the wrong section. Please move this thread to the appropriate section. I'm really sorry

Thanks
 
The stone is moving in liquid with terminal velocity. So the net force acting on it zero. So the work done on the stone is zero.
 
Thanks a lot rl.bhat ! :smile:

And I'm sorry for posting in wrong section.
 

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