Two Masses One on Table, One Hanging

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Homework Help Overview

The problem involves two masses, one on a table and one hanging, connected by a string. The system is released from rest, and the context includes friction between the block on the table and the surface.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the forces acting on each mass, including tension and friction. There is confusion about the source of tension and the role of the coefficient of friction. Questions are raised about the presence of a third mass and the interpretation of the problem setup.

Discussion Status

Some participants are exploring the net forces on each block and noting that both will accelerate at the same rate due to the properties of the string. Guidance has been offered regarding the application of Newton's laws, though interpretations of the problem vary.

Contextual Notes

There is a mention of a coefficient of friction of 3.00, which raises questions about its applicability. The absence of a third mass (m3) is also noted, indicating potential misinterpretation of the problem setup.

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Homework Statement



A block of mass1 5.0 kg is on a table that bonds a coefficient of friction of 3.00. Mass1 is attached to Mass2 by a string, and Mass2 is hanging over the table. The system is released from rest for it to accelerate.

Homework Equations



F=ma
F fric = μFnormal

The Attempt at a Solution



\sum Fx of Mass1 = F tension - F friction

\sum Fy of Mass1 = 0

\sum Fx of Mass2 = 0

\sum Fy of Mass2 = FW - F tension

Is tension created by the mass1 or mass2?
im guessing both? but that doesn't make any sense...
 
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1. Where is m3?
2. Is coefficient of friction of 3.00 is between the block and table?
 
azizlwl said:
1. Where is m3?
2. Is coefficient of friction of 3.00 is between the block and table?

no m3...

2. yes
 
ok wrong interpretation.

Find net force on each block.
Both will accelerate at equal rate for the string is massless and inextensible.
 
Last edited:
oops one on table, one hanging
 
Use Newton's 3rd law.
The hanging block will pull the block on the table.
The block on the table will pull the hanging block with equal force.
 

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