What are the two categories of friction?

1 Answer
Morgan
Sep 11, 2017

Static and kinetic.

Explanation:

I assume that you are looking for kinetic friction and static friction.

In short:

  • Static friction occurs between two surfaces which are not moving relative to each other, and the force of static friction must be overcome in order for the surfaces to begin moving relative to each other.

  • Kinetic friction occurs between two surfaces which are moving relative to each other already.

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