FBW goals are aircraft and mission specific an airliner can have FBW (Airbus as an example). The limits again are imposed to avoid undesired characteristics of extreme AoA and based and the properties of the specific aircraft. FBW is again aircraft specific, the instability of the teen series US fighters are seen as advantages to their users.
60km/h, AOA? Attitude (aircraft, not yours)? Throttle position? Altitude? Winds? Expected behaviour given all of the above?
I'll assume 60km/h wings level, wheels down, 1G on the taxiway - do not expect uncontrolled departure.