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Q.

Three particles of masses 8 kg, 4 kg and 4 kg situated at (4,1), (–2,2) and (1,–3) are acted upon by external forces  and . The acceleration of centre of mass of the system is

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a

0.625 ms-2

b

6.25 ms-2

c

2.2 ms-2

d

22 ms-2

answer is A.

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Detailed Solution

m1 = 8kg, m2 = 4kg, m3 = 4kg
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Three particles of masses 8 kg, 4 kg and 4 kg situated at (4,1), (–2,2) and (1,–3) are acted upon by external forces  and . The acceleration of centre of mass of the system is