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    Question

    For a system of particles, the center of mass

    moves:
    A Along a straight line only Correct Answer Incorrect Answer
    B In the direction of resultant external force Correct Answer Incorrect Answer
    C With uniform velocity always Correct Answer Incorrect Answer
    D Toward the heaviest particle Correct Answer Incorrect Answer

    Solution

    The center of mass follows Newton’s laws as if all the external forces were acting on it.

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