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Polishing Surfaces in Contact to Change Friction

To sharpen th...

Question

To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?

A

stone

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B

plastic block

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C

wooden block

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D

glass block

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Solution

The correct option is A stone
Stone exerts a greater frictional force which sharpens the blades upon rubbing.

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Q. Question 3
To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?

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