Example: A model airplane of mass 1 kg accelerates from rest to a velocity of 6 m / s due north in 2 s. The net force required to produce this acceleration is 3 newtons due north. The change in momentum is 6 kg ⋅ m / s. The rate of change of momentum is 3 (kg ⋅ m / s) / s = 3 N.
a quantity 15 m/s to the north is a measure of
velocity