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November 3rd, 2010, 08:34 PM   #1
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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 .

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November 3rd, 2010, 10:34 PM   #2
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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.
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November 4th, 2010, 05:39 AM   #3
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Re: physic I want example in which the force

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