A ladder weighs 150 N, is 5m long, and is leaning against a frictionless wall at an angle of 30* with the horizontal. A person who weighs 300 N is 2/3 of the way up the ladder. The ground has an unknown cofficient of friction.
A. Draw an extended freebody diagram of this situation.
B. What is the minimum coefficient of static friction which will keep the ladder from slipping.