A plane is in a steep downward plunge. To not crash, Captain Q pulls as much as he can. When the plane is at the lowest point of the plane's path the plane is in a circular arc of radius 450m. Captain Q experiences an acceleration of 5.0g ( so her weight feels like six times normal). How fast is the plane's going during this point?

v^2 / r = 5 g

v = √(5 * 9.8 * 450)