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[" 7.A weightless ladder "20ft" long res...

[" 7.A weightless ladder "20ft" long rests against cern "],[" a frictionless wall at an angle of "60^(@)" from the "180],[" horizontal.A "150" pound man is "4ft" from the "NS],[" top of the ladder.A horizontal force is needed "],[125" icelt trom ol ing "SOLVED" QUESTIONS "],[125" Find magnetute "]

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A weightless ladder 20 ft long rests against a frictionless wall at an angle of 60^(@) from the horizontal. A 150 pound man is 4 ft from the top of the ladder. A horizontal force is needed to keep it from slipping. Choose the correct magnitude from the following.

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