How Does Friction Affect the Reaction Force Between Two Blocks?

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Homework Help Overview

The discussion revolves around a physics problem involving two blocks on a frictionless table, with one block against a wall. The original poster describes a scenario where a force is applied to one block, and they seek to understand the reaction force considering the friction between the blocks.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants question the direction of the applied force and the type of friction involved. There are inquiries about the presence of friction between the block and the wall, as well as the accuracy of the problem statement provided by the original poster.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem. Some have provided clarifying questions regarding the setup and assumptions, while others express skepticism about the completeness of the original poster's description.

Contextual Notes

There is a noted absence of a diagram, which may hinder understanding. The original poster's mention of a specific frictional coefficient and the applied force raises questions about the conditions of the problem, particularly regarding static versus kinetic friction.

Epshita
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Homework Statement



There are two blocks against a wall on a frictionless table. I can't really manage a diagram, so please imagine this. There are two blocks, one of 5 kg and another of 10 kg, against each other. The 10 kg one is touching the wall.

The frictional coefficient between the two blocks is 0.2

A force of 200 N is applied to the 5 kg block. What is the reactional force?

Homework Equations



Newton's laws and Frictional force = frictional coef. x Normal

The Attempt at a Solution



Should it not be 200 N back? ( The ans. is 177) What role does the friction play here?
 
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which direction does the 100N force act in?
Static or kinetic friction?
Any friction between block and wall?
 
200 N force acts towards the wall. Static friction. No friction between block and wall.
 
Epshita said:
200 N force acts towards the wall. Static friction. No friction between block and wall.

And perpendicular to the wall? If so, I agree the reaction should be 200N. I strongly suspect you have not described the problem correctly.
Have you posted the statement of the problem exactly, word for word?
If there is an accompanying diagram, why can't you post it? Do you need a scanner?
 

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