A 20 kg ladder 10 m long is leaned against a frictionless wall at an angle of 55°. A 60 kg electrician slowly climbs the ladder. The coefficient of static friction between the ladder and the floor is 0.5. How far up the ladder can she climb before it starts to slip? If she resets the ladder at a higher angle, she can go all the way to the top. What is the minimum angle?
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A 20 kg ladder 10 m long is leaned against a frictionless wall at an angle of 55°. A 60 kg electrici...
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