What do you think accounts the difference between the starting friction and the sliding friction?

2 ANSWERS

1. James Augustus
   

   Static friction is a type of friction between two solid objects which are not moving comparative to each other such as static friction can resist an object from moving down on sloppy surface. The coefficient of static friction is denoted as μs. It is normally higher as compared to the coefficient of kinetic friction.
   The static friction force will be controlled by an applied force before an object can move. The maximized possible friction force between two surfaces before sliding begins is the product of the coefficient of static friction and the normal force
   To make it easier to understand, you consider that static friction is the force that stops a car wheel from moving as it rolls on the ground. The piece of the tire in contact with the ground when it is stationary relative to the ground even though the wheel is in motion, so we can define that it is static rather than kinetic friction.
   Static friction is define as limiting friction when motion is impending the maximum value. Therefore, this term is not used universally. It is also called traction.
   Kinetic (or dynamic) friction happens when two objects are rubing together as a sled on the ground and moving relative to each other and. The coefficient of kinetic friction is typically denoted asμk, and is usually less than the coefficient of static friction for the same materials.
   In many cases, Kinetic friction is now understood to be primarily caused by chemical bonding between the surfaces, rather than interlocking asperities.
    

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2. Guest4859562
   

   static

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