Question

Consider a person standing on a ladder. The ladder is 4 m long, has a mass mı 25 kg, and is leaning against the wall at an angle θ = 70°. The person has a mass m,-75 kg, and their center of mass is located 2.5 m above the ground. a) Draw a free-body diagram, modeling the ladder and person together as one object (i.e. the person will exist in the diagram only as a weight pressing on the ladder). Model the connection between the top of the ladder and the vertical wall as a roller connection b) Using the free-body diagram, find the minimum coefficient of friction u between the bottom of the ladder and the ground so that the ladder does not slip (i.e. move in the horizontal direction). (Units: none [coefficient])

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