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## Homework Statement

There is a table, and a napkin on it. The napkin has a mass

*m*n=71.6 g. On the napkin, there is a tea cup with mass

*m*c=104.6 g. What is the minimum force required for someone to pull the napkin out from under the tea cup? Assume that between the table and the napkin the friction is

*µ*k= 0.484, while the coefficient of static friction between the tea cup and the napkin is

*µ*s=0.705. Express your answer in Newtons.

## Homework Equations

F=ma

## The Attempt at a Solution

ΣF

_{xNapkin}=F-fr

_{C}-fr

_{T}(where C is cup and T is table)

ΣF

_{xCup}=fr

_{N}(where N is napkin)

I have also included a photo of my FBD

How can I proceed with this question? Do I have a correct FBD?