Blocks on a tabletop attached to a mass suspended by a pulley

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Homework Help Overview

The discussion revolves around a physics problem involving blocks on a tabletop connected to a mass suspended by a pulley. The participants are exploring concepts related to forces, static friction, and mass calculations.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the importance of fundamental equations such as f=ma and the role of static friction in determining the mass of block C. There are attempts to clarify the relationship between normal force and the weights of the blocks.

Discussion Status

Some guidance has been offered regarding the calculation of static friction and its relationship to the mass of block C. Multiple interpretations of the normal force are being explored, indicating an active discussion without explicit consensus.

Contextual Notes

Participants note that the material has not yet been covered in class, which may affect their understanding and approach to the problem.

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Homework Statement


PhysicsPRoblem.jpg



Homework Equations



We have yet to go over this material, which kinda pisses me off, but I'm guessing that:

f=ma, w=ma, g = 9.8m/s/s

are important

The Attempt at a Solution



If somebody could point me in the right direction that would be very helpful. I attempted at drawing a diagram of the forces on each object, but I'm not sure where to even start.
 
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You want to find the mass of block C so that it moves block A but not too large that it overcomes the static friction between block A and block B I believe. So find the static friction and divide it by g to find the mass of Block C

static friction = (coefficient of static friction) (reaction/normal force)
 
So will the normal force be the mass of the two blocks times gravity?
 
the normal force should be equal to the weight of Block B
 
Thank you so much

I got 3.75 kg
 

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