7 a 600 kg painter is climbing a uniform 120 kg ladder as shown the la
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7. A 60.0 kg painter is climbing a uniform 12.0 kg ladder as shown. The ladder begins to slip when the painter is 70% of the way up the ladder.
What is the coefficient of static friction between the ladder and the floor? The ladder and the wall are friction less. Hint:Normal force is perpendicular to the floor. (4)