A. When accelerating, the resultant force acting on it must be equal to zero.
B. There must always be a non-zero resultant force acting on it.
C. At a steady velocity, the resultant force acting on it must be equal to zero
D. At a steady velocity, the air resistance must be equal to zero.

Correct Answer:

Option C – At a steady velocity, the resultant force acting on it must be equal to zero

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