Question

Two particles are moving with constant speed v such that they are always at a constant
distance d apart and their velocities are always equal and opposite. After what time will
they return to their initial positions?

Answer 1

as the 2 particles moving with constant speed are always at a constant distance d,they must be at the 2 ends of diameter of circular paths  each particle will return to its initial position aftr completing circular path =2^1 r=^1d
time interval=distance speed 
                   
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