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The first law of Newton suggests that an object will keep moving until an equal or opposite force reacts onto it changing its speed or direction of momentum. A force that would ALWAYS oppose motion would be friction because we are surrounded by air and anything in motion will always have air molecules bumping against it causing it to slow down. Even the road causes friction on the wheels of a car; pavement causes friction on your shoes and so on. The only place friction can be negligible (not in all cases) is in a vacuum where no air is present and that is only if the object is not rubbing against anything else. i.e. the outer space

So the answer to your question is pretty vague unless you specify WHERE this object would be. Depending on the surroundings, there is almost always something that opposes motion even if it doesn't seem like there is any friction present. i.e. hockey puck on ice may seem like it has no friction but that is not true!

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14y ago

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