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why is friction useful. There are any references about why is friction useful in here. you can look below.
why is friction useful
when is friction useful
when is friction useful examples
why is friction not useful
why is high friction useful
what is friction used for
what is the role of friction
how can friction be helpful
why is friction useful, when is friction useful, when is friction useful examples, why is friction not useful, why is high friction useful, what is friction used for, what is the role of friction, how can friction be helpful
