At t = 0, six birds are flying south at 10 m/s. Their masses and their velocities at a later time are:
(a) 200 g, 10 m/s north at t = 30 s
(b) 200 g, 10 m/s east at t = 30 s
(c) 200 g, 20 m/s north at t = 60 s
(d) 400 g, 20 m/s north at t = 60 s
(e) 400 g, 20 m/s south at t = 10 s
(f) 400 g, 30 m/s west at t = 90 s
Rank them in order of the magnitude of the momentum change, smallest to largest.