In a two-particle system with particle masses m1 and m2, the first particle is pushed towards the centre of mass through a distance d, the distance through which second particle must be moved to keep the centre of mass at the same position is
A
m2dm1
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B
d
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C
m1d(m1+m2)
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D
(m1+m2)dm1
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E
m1dm2
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Solution
The correct option is Em1dm2 given masses are m1 and m2
let x and y be the distance of m1 and m2 from the centre of mass respectively, then
m1x=m2y
If the mass m1 is moved by a distance d1, and mass m2 be moved by a distance d2 , then