An 80-Kg Man Is One Fourth of the Way Up

question 19

Multiple Choice

An 80-kg man is one fourth of the way up a 10-m ladder that is resting against a smooth,frictionless wall.If the ladder has a mass of 30 kg and it makes an angle of 60° with the ground,find the force of friction of the ground on the foot of the ladder.

• A) 7.8 × 10² N
• B) 2.0 × 10² N
• C) 50 N
• D) 1.7 × 10² N

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