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【Daily Question】Theoretical Foundation 2020.02.08

2020-02-08View Original

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Multiple-choice question: When a point moves and the magnitude of its position vector remains constant while its direction can change, then its path of motion is (). (A) Straight line (B) Circle (C) Any curve (D) Cannot be determined. Answer: B If the magnitude of the position vector remains constant while its direction can change, then the distance from the point to the origin is constant, and the point can only move in a circular path. Tip: An additional reward will be given to those who can explain the problem-solving process; the answers can be seen there!

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