The door brace AB is to be designed to prevent opening the door. If the brace forms

Question:

The door brace AB is to be designed to prevent opening the door. If the brace forms a pin connection under the doorknob and the coefficient of static friction with the floor is μs determine the largest length L the brace can have to prevent the door from being opened. Neglect the weight of the brace.

Given:

μ = 0.5

a = 3 ft