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Homework Help: physics

Posted by mike on Sunday, December 2, 2012 at 4:36pm.

A 14.0-kg chair is at rest on a flat floor. The coefficient of static friction between
the chair and the floor is 0.450. A person tries to move the chair by pushing on the
chair with a force directed at an angle of 30„a below the horizontal. What is the
minimum force that the person must apply in order to move the chair?

• physics - Henry, Tuesday, December 4, 2012 at 9:26pm

  See previous post.
  

• physics - Horatiu, Wednesday, December 12, 2012 at 12:20am

  First off the normal force is m*a so 14kg * 9.8 is 137.2N. Since the person isn't pushing straight not all force goes directly to moving the chair. So 137.2=xcos30. x=158.42N.
  

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