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Where does the centre of mass of two particles of an equal mass lie?

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in Engineering Physics I by (558k points)
Where does the centre of mass of two particles of an equal mass lie?

(a) Inside the body

(b) Outside the body

(c) Near the first body

(d) Midway between them

The question was posed to me during an online exam.

My enquiry is from Angular Momentum topic in section System of Particles and Rotational Motion of Engineering Physics I

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Correct choice is (d) Midway between them

Best explanation: The centre of mass of two particles of equal masses lies midway between them. Its position vector is the average of the position vectors of the two particles.

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