Which of the following helps INCREASE friction deliberately?
ASprinkling fine powder on a carrom board
BPolishing the surface
CTreading the soles of shoes
DPouring oil between moving parts
Answer & Solution
Correct answer: C. Treading the soles of shoes
Polishing, oiling and sprinkling powder are all ways to REDUCE friction. Treading the sole of a shoe deliberately INCREASES friction with the ground, giving the wearer better grip and reducing the chance of slipping.
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