Activity 1. A 25-kg ladder, 4 m long, rests on a rough floor and against a vertical wall. The ladder makes an angle of 35° with the horizontal as shown. It starts to slip when a man weighing 75 kg has climbed halfway up. If f = 0.20 at the wall, find the coefficient of friction (u) at the floor. 75 Kg 2m 2m +w=25Kg 350

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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Please nswer Activities 1 and 2. Thank You!

Activity 2. What weight W is necessary to start the system of blocks shown to the
right? The coefficient of friction is 0.10 and the pulleys are assumed to be frictionless.
(b)
(a)
400#
600#
7//
30°
Transcribed Image Text:Activity 2. What weight W is necessary to start the system of blocks shown to the right? The coefficient of friction is 0.10 and the pulleys are assumed to be frictionless. (b) (a) 400# 600# 7// 30°
Activity 1. A 25-kg ladder, 4 m long, rests on a rough floor and against a vertical wall.
The ladder makes an angle of 35° with the horizontal as shown. It starts to slip when a
man weighing 75 kg has climbed halfway up. If f = 0.20 at the wall, find the coefficient of
friction (u) at the floor.
75 Kg
2m
B
2m
tw-25Kg
+W=25Kg
35°
7// /77
Transcribed Image Text:Activity 1. A 25-kg ladder, 4 m long, rests on a rough floor and against a vertical wall. The ladder makes an angle of 35° with the horizontal as shown. It starts to slip when a man weighing 75 kg has climbed halfway up. If f = 0.20 at the wall, find the coefficient of friction (u) at the floor. 75 Kg 2m B 2m tw-25Kg +W=25Kg 35° 7// /77
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