With respect to a frame fixed to the centre of mass of a two particle system, some statements are given in following options. Select the correct statement if the particles don’t have same velocity w.r.t. an inertial frame.
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a
The two particles may move in same direction
b
The two particles must move in opposite directions
c
The two particles may have perpendicular velocities
d
The two particles should have same momentum
answer is B.
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Detailed Solution
With respect to the centre of mass reference frame the total momentum of the system is zero. Hence the particles must move towards each other