A common experience is to find that a steady pull is required to keep an object moving, even on a level surface, when friction is present. Analyzing this experience in light of the laws of motion, the accepted conclusion is that
A. the laws of motion do not apply where there is friction.
B. the laws of motion only apply when you start pulling or stop.
C. the object is really accelerating but it is not apparent.
D. your pull is canceled by the third law reaction force.
E. a frictional force exactly opposes your pull and the first law applies.
Answer: E
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