Question

_ with sandpaper helps to reduce friction due to surface irregularites​

Answer 1

Answer:

Sandpaper grinding: Rough surfaces and edges are polished using sandpaper to ensure smoothness. The rough and hard surface of the sandpaper breaks the irregularity in the surface thus reducing the roughness of the surface. This is a very common technique used to grind to reduce friction in wooden surfaces.

Explanation:

Answer 2

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