Ship Acceleration and Velocity

gistfile1.cs

public float Acceleration { get; set; }

public void Update(GameTime gameTime)
{
    var additionalVelocity = new Vector2((float)Mat.Cos(Rotation) * Acceleration, (float)Math.Sin(Rotation) * Acceleration);

    var newVelocity = CurrentVelocity + additionalVelocity;

    if (Math.Abs(newVelocity.DistanceTo(Vector2.Zero)) <= 250)
    {
        CurrentVelocity = newVelocity;
    }
}