Which of the following physical laws can make a simulated collision seem more realistic? motion gravity fluid dynamics thermodynamics

Short Motion

Long It depends on the type of simulation is being run, if it's between large masses such as planets, gravity is a must-have, for differing temperatures, thermodynamics, for liquids, liquid Dynamics, but most have one thing in common, they all do not seem realistic without motion.

Angular velocity and linear velocity are related by the equation:
v =  ωr; r is the radius
v = 50 x 9/2
v = 225 feet per second