Problem 2: A ladder 6 m long has a mass of 18 kg and its center of gravity is 2.4 m from the bottom. Thae ladder is placed against a vertical wall so that it makes an angle of 60. with the ground. How...

Extracted text: Problem 2: A ladder 6 m long has a mass of 18 kg and its center of gravity is 2.4 m from the bottom. Thae ladder is placed against a vertical wall so that it makes an angle of 60. with the ground. How far up the ladder can a 72 kg man climb before the ladder is on the verge of slipping? The angle of friction at all contact surfaces is 15..