12.0 m 8.0 m c40°

Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter1: Heat, Temperature, And Pressure
Section: Chapter Questions
Problem 17RQ: Convert 22C to Fahrenheit.
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Question

A ladder carried by a fire truck is 20.0 m
long. The ladder weighs 3400 N and its center of gravity is at its center.
The ladder is pivoted at one end (A) about a pin (Fig. ); ignore
the friction torque at the pin. The ladder is raised into position by a
force applied by a hydraulic piston at C. Point C is 8.0 m from A, and
the force F S exerted by the piston makes an angle of 40° with the ladder.
What magnitude must F S have to just lift the ladder off the support
bracket at B? Start with a free-body diagram of the ladder. 

12.0 m
8.0 m
c40°
Transcribed Image Text:12.0 m 8.0 m c40°
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