Question

what is centre of mass​

Answer 1

Answer:

the center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero. ... It is a hypothetical point where entire mass of an object may be assumed to be concentrated to visualise its motion.

Answer 2

Answer:

The center of mass is the unique point at the center of a distribution of mass in space that has the property that the weighted position vectors relative to this point sum to zero. In analogy to statistics, the center of mass is the mean location of a distribution of mass in space.

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