How Does Energy Conservation Affect Block Movement Near a Wall?

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Homework Help Overview

The discussion revolves around the application of conservation of mechanical energy in the context of a block's movement near a wall. Participants are attempting to determine how close the block will come to the wall, considering the absence of friction and the given distance.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants are exploring the implications of energy conservation on the block's movement, questioning the assumptions about the distance d and the forces acting on the block. There is a focus on understanding the conditions at point B and the significance of the force mentioned.

Discussion Status

The discussion is ongoing, with participants raising questions about the assumptions made regarding the distance and the forces involved. Some guidance has been offered regarding the conditions at point B, indicating that there may be more to consider in the analysis.

Contextual Notes

There appears to be a missing piece of information regarding the force acting on the block at point B, which has led to confusion about the block's state at that moment.

AdkinsJr
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Homework Statement

problem.PNG


2. Homework Equations

Conservation Mechanical Energy

The Attempt at a Solution



I need to find how close to the wall the block will come. Since there's no friction, I presumed there'd be enough energy, and only enough energy, to go the same distance d to the left of A. Also note that d=-0.2m. This answer is incorrect however. I don't understand. [/B]
 
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AdkinsJr said:

Homework Statement

View attachment 196397

2. Homework Equations

Conservation Mechanical Energy

The Attempt at a Solution



I need to find how close to the wall the block will come. Since there's no friction, I presumed there'd be enough energy, and only enough energy, to go the same distance d to the left of A. Also note that d=-0.2m. This answer is incorrect however. I don't understand. [/B]
Why do you think that ##d =0.2m##?
 
PeroK said:
Why do you think that ##d =0.2m##?
This is given.
 
AdkinsJr said:
This is given.
What's this force of ##18.8 N## then?
 
Oh, I'm sorry I didn't realize something was missing. The force is taken away at point B.
 
AdkinsJr said:
Oh, I'm sorry I didn't realize something was missing. The force is taken away at point B.
Do not assume the block is at rest at that point.
 

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