The coordinates of the centre of mass of objects of mass 10, 20, 30 kg are (1,1,1) m. Where should an object of mass 40 kg be placed such that the centre of mass of this new system lies at (0,0,0)?

The coordinates of the centre of mass of objects of mass 10, 20, 30 kg

1.	The coordinates of the centre of mass of objects of mass 10, 20, 30 kg are (1,1,1) m. Where should an object of mass 40 kg be placed such that the centre of mass of this new system lies at (0,0,0)?
A.	3/2, 3/2, 3/2
B.	-3/2, -3/2, -3/2
C.	3/4, 3/4, 3/4
D.	-3/4, -3/4, -3/4
Answer» C. 3/4, 3/4, 3/4

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The coordinates of the centre of mass of objects of mass 10, 20, 30 kg are (1,1,1) m. Where should an object of mass 40 kg be placed such that the centre of mass of this new system lies at (0,0,0)?

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