WAEC Physics 2013 Objective — Question 5
Question 5 of 50 from the West African Examinations Council (WAEC) Physics 2013 Objective paper, with the correct answer and a full explanation.
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Solid friction, like viscosity, is
- A. independent of the surface areas in contact
- B. independent of the relative motion between layers
- C. dependent on normal reaction
- D. in opposition to motionCorrect
Explanation
Both solid friction and viscosity oppose relative motion between surfaces/layers.
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