a particle A has a circular movement with radius R and angular velocity of 2w, a particle B has a radius of 2R and an angular velocity of w, both velocities remain constant. particle B rotates clockwise and particle A rotates anticlockwise for an interval of t = n/(2w) what angle is formed by the positional vectors of these two particles? the options are: 0, 3pi/2, pi/2, pi. note: the vector of these two particle's movement have the same origin, their movement make two circles, which have the same origin. particle B's circle has double the radius of particle A. They don't say absolutely anything about the value of n. from a sketch I've made, I say the angle is pi/2. but again, it all depends on the value of n. any ideas?