Calculate Normal Force: 55 N Box on Table with 35 N Box and 28 N Hanging Box

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Homework Help Overview

The problem involves calculating the normal force exerted by a table on a box weighing 55 N, which has another box weighing 35 N on top of it. Additionally, a 28 N box is hanging from a frictionless rope that passes over a frictionless pulley connected to the 35 N box. The discussion centers around understanding the forces at play in this setup.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants are considering the implications of Newton's third law and the interactions between the boxes. Questions are raised about how the hanging box affects the forces acting on the boxes on the table.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the forces involved. Some guidance has been offered regarding the relevance of Newton's third law, but there is no explicit consensus on the approach to take.

Contextual Notes

Participants are questioning how the forces from the hanging box influence the normal force on the table, indicating a need for clarity on the relationships between the weights involved.

bloccubed
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You have a box that wieghs 55 N sitting on a table. On top of that box there is another box that weighs 35 N attached to a frictionless rope that is around a frictionless pully. At the other end of the rope there is another box that is hanging with a weight of 28 N. What is the normal force that the table exerts on the 55 N box?
 
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Think 3rd law. It might help to draw this out.
 
what?

So what does that mean ? what is the force of the box that is hanging have to do with this and does that take additional force off of the 35 N box ?
 
How much force is exerted on the table? You've got the 55N box and the 35N box, but the 35N box is offset by the 28N box.
 

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