11. What is sliding friction?
A. It occurs between two surfaces that come in contact with each other.
B. It occurs in stationary objects or objects at test.
C. It occurs between moving objects and a liquid or between an object moving in the air.
D. It opposes the motion of the wheel turning along a surface.
Answers & Comments
Answer:
A. it occurs between two surfaces that come in contact with each other.
Answer:
A.it occurs between two surface that come in contact with each other
Explanation:
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