Static friction

[dougkaye]

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Consider an inclined plane problem with static friction: When the angle of the plane is increased so that the block begins to slide, what happens to the value of the static frictional force? Does it go to zero, and then there is only kinetic friction?

BR Phys passage 6 #39 deals with this question.

 

[justhanging]

Consider an inclined plane problem with static friction: When the angle of the plane is increased so that the block begins to slide, what happens to the value of the static frictional force? Does it go to zero, and then there is only kinetic friction?

BR Phys passage 6 #39 deals with this question.

It doesn't go to zero, instantly changes to kinetic friction.