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Figure 3.4 7.8 m 4) In Figure 3.4, a uniform ladder 12 meters long rests against a vertical frictionless wall. 4) The ladder weighs 480 N and makes an angle 0 of 580 with the floor. A man weighing 963 N climbs slowly up the ladder, the ladder starts to slip when the man climbs up 7.8 meters as shown in figure 3.4. What is us, the coefficient of static friction between the floor and the ladder