public Force(Displacement X) : base(X) { units = DerivedUnits.Force; }
public Momentum(Displacement X) : base(X) { units = DerivedUnits.Momentum; }
public Velocity(Displacement X) : base(X) { units = DerivedUnits.Velocity; }
public Acceleration(Displacement X) : base(X) { units = DerivedUnits.Acceleration; }
public Displacement(Displacement X) : base(X) { units = DerivedUnits.Length; }