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Homework Help: physics

Posted by Nate on Thursday, November 18, 2010 at 9:40am.

A 25 kg chair initially at rest on a horizontal floor requires 393 N horizontal force to set it in motion. Once the chair is in motion, a 301 N horizontal force keeps it moving at a constant velocity.
a) Find the coefficient of static friction between teh chair and the floor.
b) Find the the coefficient of kinetic friction between the chair and the floor.

• physics - drwls, Thursday, November 18, 2010 at 9:48am

  Use the definitions to answer the questions:
  
  (a) coeficient of static friction =
  (force required to start motion)/weight
  
  (b) coefficient of kinetic friction =
  (force required to maintain constant velocity)/weight
  
  (Make sure you use weight = M*g)
  

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