Two interacting particles form a closed system whose centre of mass is at rest. Fig. illustrates the positions of both particles at a certain moment and the trajectory of the particle of mass m_(1). Select the trajectory of the particle of mass m_(2) if m_(2)=m_(1).

Two interacting particles form a closed system whose centre of mass is

1.	Two interacting particles form a closed system whose centre of mass is at rest. Fig. illustrates the positions of both particles at a certain moment and the trajectory of the particle of mass m_(1). Select the trajectory of the particle of mass m_(2) if m_(2)=m_(1).
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