Two particles move in opposite directions along a straight line. Particle 1 of mass m1 = 15 kg at x1 = 19 m moves with a speed v1 = 43 m/s (to the right), while the particle 2 of mass m2 = 55 kg at x2 = −19 m moves with a speed v2 = −49 m/s (to the left). Given: Counter-clockwise is the positive angular direction.