At time t = 0, force F1 = (–4.00i + 5.00i) N acts on an initially stationary particle of mass 2.00 x 10–3 kg and force F2 = (2.00i - 4.00j) N acts on an initially stationary particle of mass 4.00 x 10–3 kg. From time t = 0 to t = 2.00 ms, what are the

(a) Magnitude and

(b) Angle (relative to the positive direction of the x axis) of the displacement of the center of mass of the two-particle system?

(c) What is the kinetic energy of the center of mass at t = 2.00 ms?