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Two bodies of mass 1 kg and 3 kg have position vectors î - 2ĵ + ̂k and -3î - 2ĵ + ̂k respectively. The centre of mass of this system has a position vector:
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- 2î - ĵ + ̂k
- 2î - ĵ - 2̂k
- - î - ĵ + ̂k
- - 2î + 2̂k
Correct Option: A
The position vector of the centre of mass of two particle system is given by
| →R = | |
| m1 + m2 |
| = | = [- 8î - 4ĵ + 4̂k] = - 2î - ĵ + ̂k | |
| 4 |
