An uniform 10-m ladder and leans it against the smooth (frictionless) wall of the wall. The ladder's mass is 22 kg and the bottom rests on the ground 2.8 m from the wall. A person, whose mass is 70 kg, gets 90 percent of the way to the top, the ladder begins to slip. (a) What is the horizontal force by the wall; (b) What is the horizontal force at the bottom; (c) What is the vertical force at the bottom; (d) What is the coefficient of static friction between the ground and the ladder? Ans: (a) 211.7 N; (b) 211.7 N; (c) 73.740; (d) 902.5 N; (d) 0.23 0 0.58 0.9€ mg Mg +00 2.8m T 10m
An uniform 10-m ladder and leans it against the smooth (frictionless) wall of the wall. The ladder's mass is 22 kg and the bottom rests on the ground 2.8 m from the wall. A person, whose mass is 70 kg, gets 90 percent of the way to the top, the ladder begins to slip. (a) What is the horizontal force by the wall; (b) What is the horizontal force at the bottom; (c) What is the vertical force at the bottom; (d) What is the coefficient of static friction between the ground and the ladder? Ans: (a) 211.7 N; (b) 211.7 N; (c) 73.740; (d) 902.5 N; (d) 0.23 0 0.58 0.9€ mg Mg +00 2.8m T 10m
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:An uniform 10-m ladder and leans it against the
smooth (frictionless) wall of the wall. The ladder's
mass is 22 kg and the bottom rests on the ground
2.8 m from the wall. A person, whose mass is 70 kg,
gets 90 percent of the way to the top, the ladder
begins to slip. (a) What is the horizontal force by
the wall; (b) What is the horizontal force at the
bottom; (c) What is the vertical force at the bottom;
(d) What is the coefficient of static friction between
the ground and the ladder? Ans: (a) 211.7 N; (b)
211.7 N; (c) 73.740; (d) 902.5 N; (d) 0.23
I
0
0.58
by will
0.98
mg Mg
2.8m
10m
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