(Solved): A ladder leans against a smooth wall as shown in the figure. The ladder weighs 200 N and its center ...

A ladder leans against a smooth wall as shown in the figure. The ladder weighs 200 N and its center of gravity is 0.40 L from the base, where \( L \) is the ladder's length. Calculate the friction force in kN that must exist at the base of the ladder to maintain equilibrium. 2