Masses 1 kg, 1.5 kg, 2 kg, and M kg are situated at (2,1,1), (1,2,1), (2,-2,1) and (-1,4,3). What is the value of M if their centre of mass is at (1,1,3/2)?

Masses 1 kg, 1.5 kg, 2 kg, and M kg are situated at (2,1,1), (1,2,1)

1.	Masses 1 kg, 1.5 kg, 2 kg, and M kg are situated at (2,1,1), (1,2,1), (2,-2,1) and (-1,4,3). What is the value of M if their centre of mass is at (1,1,3/2)?
A.	1 kg
B.	1.5 kg
C.	2 kg
D.	2.5 kg
Answer» C. 2 kg

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Masses 1 kg, 1.5 kg, 2 kg, and M kg are situated at (2,1,1), (1,2,1), (2,-2,1) and (-1,4,3). What is the value of M if their centre of mass is at (1,1,3/2)?

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