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 November 3rd, 2010, 08:34 PM #1 Senior Member   Joined: Oct 2009 Posts: 895 Thanks: 1 physic I want example in which the force Hi all 1 ) I want example in which the force of friction exerted on the object is in the dirction of the motion of the object . 2 ) What id the distinguish between the forcewa of static friction and kinetick friction . Thanks
 November 3rd, 2010, 10:34 PM #2 Senior Member     Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 520 Math Focus: Calculus/ODEs Re: physic I want example in which the force The force of friction between an automobiles tires and the pavement can be in the direction of the automobile's motion, such as when it is accelerating. In the vast majority of situations though, friction retards motion, i.e. it is in the opposite direction to motion. When an object is moving, the force of friction is kinetic, and when the object is stationary, the force of friction is static. In fact the words static and stationary come from the same root. Normally, the coefficient of static friction is greater than the coefficient of kinetic friction. I'm sure you've pushed a heavy object across the floor, and noticed it is easier to keep the object moving once you get it moving.
 November 4th, 2010, 05:39 AM #3 Senior Member   Joined: Oct 2009 Posts: 895 Thanks: 1 Re: physic I want example in which the force thanks

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