Which of the following statements are TRUE about frictional force? i. it is always a...

JAMB 1995

Which of the following statements are TRUE about frictional force? i. it is always a disadvantage ii. it is sometimes a disadvantage iii. it always exist where there is a relative motion of two bodies that are in contact iv. it is sometimes very useful

A. i, iii only
B. i, iv only
C. ii, iii only
D. iii, iv only

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Correct Answer: Option D

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