text: # static friction problem
  
  • Oct 15th 2007, 12:21 PM
  rcmango
  static friction problem
  heres the question:
  
  A bedroom bureau with a mass of 47 kg, including drawers and clothing, rests on the horizontal floor. The coefficient of static friction between the bureau and the floor is 0.45 and nothing except the floor is touching the bureau initially.
  
  need to know
  
  the static friction force on the bureau initially?
  in Newtons
  
  Now you pull horizontally with a force of 83 N. What is the magnitude of the static frictional force?
  in Newtons
  
  and then What minimum horizontal force must you apply to start the bureau moving?
  in Newtons
  
  • Oct 15th 2007, 12:31 PM
  topsquark
  Quote:
  
  Originally Posted by rcmango
  heres the question:
  
  A bedroom bureau with a mass of 47 kg, including drawers and clothing, rests on the horizontal floor. The coefficient of static friction between the bureau and the floor is 0.45 and nothing except the floor is touching the bureau initially.
  
  need to know
  
  the static friction force on the bureau initially?
  in Newtons
  
  The static friction force is no larger than it needs to be, up to the maximum value.
  
  So draw a Free-Body Diagram. What forces are on the bureau? (Hint: if there are no applied horizontal forces on the bureau, what does the static friction force have to be in order for it not to move sideways?)
  
  Quote:
  
  Originally Posted by rcmango
  Now you pull horizontally with a force of 83 N. What is the magnitude of the static frictional force?
  in Newtons
  
  Now you have an applied horizontal force. Is this force greater than the maximum for the static friction? Again, refer to the FBD and recall that $\displaystyle f_{s,max} = \mu _s N$. If the applied force is not greater than the maximum static friction force, how large does the friction force have to be to keep the bureau in place?
  
  Quote:
  
  Originally Posted by rcmango
  and then What minimum horizontal force must you apply to start the bureau moving?
  in Newtons
  
  For this one you have to apply a force that exceeds the maximum for static friction. What force would this be?
  
  -Dan
explanation: The document contains a math and physics problem related to static friction. It includes a question about the static friction force on a bureau initially, the static frictional force when a horizontal force of 83 N is applied, and the minimum horizontal force required to start the bureau moving. The document also includes a detailed explanation and solution provided by a user named topsquark.
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  Output rules:
  
  1. Briefly describe the document and mention if it contains a question or a question and answer.
  2. Finalize the output with: Label: no-question,question,question-and-answer,multiple-question,multiple-question-and-answer
distilabel_metadata.role: system
distilabel_metadata.content: # static friction problem
  
  • Oct 15th 2007, 12:21 PM
  rcmango
  static friction problem
  heres the question:
  
  A bedroom bureau with a mass of 47 kg, including drawers and clothing, rests on the horizontal floor. The coefficient of static friction between the bureau and the floor is 0.45 and nothing except the floor is touching the bureau initially.
  
  need to know
  
  the static friction force on the bureau initially?
  in Newtons
  
  Now you pull horizontally with a force of 83 N. What is the magnitude of the static frictional force?
  in Newtons
  
  and then What minimum horizontal force must you apply to start the bureau moving?
  in Newtons
  
  • Oct 15th 2007, 12:31 PM
  topsquark
  Quote:
  
  Originally Posted by rcmango
  heres the question:
  
  A bedroom bureau with a mass of 47 kg, including drawers and clothing, rests on the horizontal floor. The coefficient of static friction between the bureau and the floor is 0.45 and nothing except the floor is touching the bureau initially.
  
  need to know
  
  the static friction force on the bureau initially?
  in Newtons
  
  The static friction force is no larger than it needs to be, up to the maximum value.
  
  So draw a Free-Body Diagram. What forces are on the bureau? (Hint: if there are no applied horizontal forces on the bureau, what does the static friction force have to be in order for it not to move sideways?)
  
  Quote:
  
  Originally Posted by rcmango
  Now you pull horizontally with a force of 83 N. What is the magnitude of the static frictional force?
  in Newtons
  
  Now you have an applied horizontal force. Is this force greater than the maximum for the static friction? Again, refer to the FBD and recall that $\displaystyle f_{s,max} = \mu _s N$. If the applied force is not greater than the maximum static friction force, how large does the friction force have to be to keep the bureau in place?
  
  Quote:
  
  Originally Posted by rcmango
  and then What minimum horizontal force must you apply to start the bureau moving?
  in Newtons
  
  For this one you have to apply a force that exceeds the maximum for static friction. What force would this be?
  
  -Dan
distilabel_metadata.role: user
distilabel_metadata.raw_output_q_a_detector_0: The document contains a math and physics problem related to static friction. It includes a question about the static friction force on a bureau initially, the static frictional force when a horizontal force of 83 N is applied, and the minimum horizontal force required to start the bureau moving. The document also includes a detailed explanation and solution provided by a user named topsquark.
  
  Label: question-and-answer