What happen when a smooth metal slides on a smooth polymer


Problem:

When a smooth metal slides on a smooth polymer:

1) It is necessary to use a lubricant

2) The friction will be very high

3) The wear will be abrasive in character

4) Fatigue wear will likely occur

5) There will be no wear at all

Please suggest the correct option.

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Biology: What happen when a smooth metal slides on a smooth polymer
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