The P property determines how much power is used while applying force in order to reach the goal Velocity . The higher this value, the more power will be used and the faster it will be used.
The force the BodyVelocity exerts increases as the difference between the part’s current velocity and the goal velocity increases. This property is multiplied to this force to either amplify or diminish it.
I’m surprised it hasn’t been deprecated yet as currently it does absolutely nothing.
It used to control the power of the applied force however that was only when the PGS Physics Solver was disabled, which has been force enabled for over a year.