(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A bureau rests on a rough horizontal surface ([tex]\mu[/tex]_{s}= 0.50, [tex]\mu[/tex]_{k}= 0.40). A constant horizontal force, just sufficient to start the bureau in motion, is then applied. The acceleration of the bureau is:

A. 0

B. 0.98 m/s^{2}

C. 3.3 m/s^{2}

D. 4.5 m/s^{2}

E. 8.9 m/s^{2}

3. The attempt at a solution

The answer is B and I can't figure out why. I tried to use only [tex]\mu[/tex]_{s}and set friction equal to ma. It gave me C.

I can see where B comes from, kinetic friction is subtracted from static friction. Can someone explain why?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Friction problem of a bureau

**Physics Forums | Science Articles, Homework Help, Discussion**