A Uniform Ladder 15 Ft Long Is Leaning Against a Frictionless

question 9

Multiple Choice

A uniform ladder 15 ft long is leaning against a frictionless wall at an angle of 53° above the horizontal. The weight of the ladder is 30 pounds. A 75-lb boy climbs 6.0-ft up the ladder. What is the magnitude of the friction force exerted on the ladder by the floor?

• A) 43 lb
• B) 34 lb
• C) 38 lb
• D) 47 lb
• E) 24 lb

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