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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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