How Does Friction Affect the Reaction Force Between Two Blocks?

AI Thread Summary
The discussion centers on a physics problem involving two blocks on a frictionless table, where a 200 N force is applied to a 5 kg block against a 10 kg block that is touching a wall. The frictional coefficient between the blocks is 0.2, leading to confusion about the reaction force, which is calculated to be 177 N instead of the expected 200 N. Participants debate the role of friction, questioning whether static or kinetic friction applies and if there is any friction between the blocks and the wall. Concerns are raised about the clarity of the problem statement and the absence of a diagram, which could aid in understanding the scenario. Overall, the discussion highlights the complexities of analyzing forces and friction in a multi-block system.
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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