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प्रश्न
To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?
विकल्प
Stone
Plastic block
Wooden block
Class block
MCQ
उत्तर
Stone
Explanation -
Stone will be more suitable because it will exert greater reaction and hence greater friction force which sharpen the blade of a knife easily by rubbing.
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Factors Affecting Friction
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