Question

A weightless ladder, 20 ft long rests against a frictionless wall at an angle of 60° with the horizontal. A 150 pound man is 4 ft from the top of the ladder. A horizontal force is needed to prevent it from slipping. Choose the correct magnitude from the following

Options :

  1. 175 lb

  2. 100 lb

  3. 70 lb

  4. 150 lb

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Report

Answer :

70 lb

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