1. The problem statement, all variables and given/known data the question doesnt state that which particle is leading/lagging which particle. 2. Relevant equations 3. The attempt at a solution for the first particle, my working is 10 sin(2pi/3 )= 8.66cm for the second paticle, my working is 10 sin(2pi/3+ 30pi/180)= 5 cm so my final answer is 8.66-5 = 3.66 the sample ans is attached below. how do we know that the second particle is lagging behind first particle?