Why is the answer to gravitational potential energy question C?

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Homework Help Overview

The discussion revolves around a question related to gravitational potential energy, specifically concerning a cubical block and its center of mass. Participants are trying to understand the reasoning behind a specific answer choice.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants are exploring the gravitational potential energy of a cubical block and discussing the significance of the center of mass in their calculations. One participant attempts to derive a formula involving mass and height.

Discussion Status

The discussion is ongoing, with some participants providing affirmations of correctness regarding the calculations presented. However, there is no explicit consensus on the reasoning behind the answer choice.

Contextual Notes

There is a reference to a specific answer choice (C) that is being questioned, but the details of the problem setup and any additional constraints are not provided in the discussion.

jack1234
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The answer is c, but I can't figure out what is the reason, can somebody kindly explain it?
http://tinyurl.com/32322t
 
Last edited:
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What do you think about gravitational potential energy of a cubical block?
 
I am thinking about centre mass...
So what I am figuring is
3m*g*(3/2 l)=9/2mgl...(3/2 l because the centre of mass is at that height)
Is it correct?
 
perfect.
 

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