A safety device used by workers climbing ladders fixed to high structures consists of a rail attached to the ladder and a sleeve that can slide on the flange of the rail. A chain connects the worker’s belt to the end of an eccentric cam that can be rotated about an axle attached to the sleeve at C. Determine the smallest allowable common value of the coefficient of static friction between the flange of the rail, the pins at A and B, and the eccentric cam if the sleeve is not to slide down when the chain is pulled vertically downward.
A safety device used by workers climbing ladders fixed to high structures consists of a rail attached to the ladder and a sleeve that can slide on the flange of the rail. A chain connects the worker’s belt to the end of an eccentric cam that can be rotated about an axle attached to the sleeve at C. Determine the smallest allowable common value of the coefficient of static friction between the flange of the rail, the pins at A and B, and the eccentric cam if the sleeve is not to slide down when the chain is pulled vertically downward.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
Related questions
Question
A safety device used by workers climbing
ladders fixed to high structures
consists of a rail attached to the ladder and a
sleeve that can slide on the
flange of the rail. A chain connects the
worker’s belt to the end of an
eccentric cam that can be rotated about an axle
attached to the sleeve at C.
Determine the smallest allowable common
value of the coefficient of
static friction between the flange of the rail,
the pins at A and B, and the
eccentric cam if the sleeve is not to slide down
when the chain is pulled
vertically downward.
Transcribed Image Text:A
4 ст
0.8 cm
DI
4 сm
E
B'
3 сm
6 ст
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