# Homework Help: Two Masses One on Table, One Hanging

1. Sep 29, 2012

### freeofwork

1. The problem statement, all variables and given/known data

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.

2. Relevant equations

F=ma
F fric = μFnormal

3. 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...

2. Sep 29, 2012

### azizlwl

1. Where is m3?
2. Is coefficient of friction of 3.00 is between the block and table?

3. Sep 29, 2012

### freeofwork

no m3.....

2. yes

4. Sep 29, 2012

### azizlwl

ok wrong interpretation.

Find net force on each block.
Both will accelerate at equal rate for the string is massless and inextensible.

Last edited: Sep 29, 2012
5. Sep 29, 2012

### freeofwork

oops one on table, one hanging

6. Sep 29, 2012

### azizlwl

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.