Momentum is the product of the mass and velocity of a
body. The algorithm can be thought of as a push or a
pull. The symbolic representation of momentum is p. The
units are kilogram-meter per second or newton-seconds.
Note that a heavier object and a lighter object can have
the same amount of momentum. If an object speeds up,
the momentum changes proportionally. Take, for
example, a ball rolling down a drum. The ball had an
initial velocity of 2 m/s and by the time it reaches the
bottom of the drum, it reaches a speed of 6 m/s. The
mass of the ball is 0.2 kg. The formula to calculate the
change in momentum is m(v-u), where m is mass, v is
final velocity, and u is initial velocity. The change in
momentum is represented as p. If a change in
momentum occurs in a very short amount of time, a very
large amount of force is acted upon the object.
Mathematically, force (F) is equal to the rate of change of
velocity (a). This can be represented as F = Δp / Δt.