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A uniform ladder stands on a rough floor and rests against a frictionless wall as shown in the figure. Since the floor is rough, it exerts both a normal force N and a frictional force fi on the ladder. However, since the wall is frictionless, it exerts only a normal force on the ladder. The ladder has a length of L 4.4 m a weight of wi 59.5 N, and rests against the wall a distance d 3.75 m above the floor. If a person with a mass of 90 kg s standing on the ladder, determine the following. (a) the forces exerted on the ladder when the person is halfway up the ladder (Enter the magnitude only.) (b) the forces exerted on the ladder when the person is three-fourths of the way up the ladder (Enter the magnitude only.)
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