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JAMB Physics 2011 Question 13

Question 13

Friction

Which of the following could be effectively used to reduce friction?

  1. A.Water.
  2. B.Petrol.
  3. C.Kerosene.
  4. D.Grease.
Show the answer and explanation

Answer: D (Grease.)

Explanation

Grease is a thick lubricant that stays between moving surfaces and keeps them apart, reducing friction. Water, petrol and kerosene run off or evaporate.