The crane truck has a weight of 11750 lb and a center of gravity at point CG. The parking brake only locks the rear wheels of the truck, so the front wheels are free to rotate. Determine the maximum force F applied at the angle 0 = 44.5° that can be exerted on the crane without it slipping or tipping for each of the following cases: Case 1: The static friction coefficient between the rear tires and the ground is µg = 0.13. Case 2: The static friction coefficient between the rear tires and the ground is µ, = 0.53. d ka sk b Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 5 ft 10 ft 4 ft d 4 ft h 11 ft For Case 1, the constraint is Select an answer v and Fmax lbs. For Case 2, the constraint is Select an answer and Fmax lbs. || BY NC SA 2013 Michael Swanbom

International Edition---engineering Mechanics: Statics, 4th Edition
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Chapter7: Dry Friction
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The crane truck has a weight of 11750 lb and a center of gravity at point CG. The parking brake only locks
the rear wheels of the truck, so the front wheels are free to rotate. Determine the maximum force F
applied at the angle 0 = 44.5° that can be exerted on the crane without it slipping or tipping for each of
the following cases:
Case 1: The static friction coefficient between the rear tires and the ground is us
= 0.13.
Case 2: The static friction coefficient between the rear tires and the ground is us
= 0.53.
d
k a sk
b.
Values for dimensions on the figure are given in the following table. Note the figure may not be to scale.
Variable Value
a
5 ft
10 ft
4 ft
d
4 ft
h
11 ft
For Case 1, the constraint is Select an answer
v and Fmax
lbs.
For Case 2, the constraint is Select an answer
and Fmax
lbs.
||
NC
2013 Michael Swanbom
Transcribed Image Text:The crane truck has a weight of 11750 lb and a center of gravity at point CG. The parking brake only locks the rear wheels of the truck, so the front wheels are free to rotate. Determine the maximum force F applied at the angle 0 = 44.5° that can be exerted on the crane without it slipping or tipping for each of the following cases: Case 1: The static friction coefficient between the rear tires and the ground is us = 0.13. Case 2: The static friction coefficient between the rear tires and the ground is us = 0.53. d k a sk b. Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 5 ft 10 ft 4 ft d 4 ft h 11 ft For Case 1, the constraint is Select an answer v and Fmax lbs. For Case 2, the constraint is Select an answer and Fmax lbs. || NC 2013 Michael Swanbom
Expert Solution
Step 1

Data given - 

F = 11750 lb 

Theta = 44.5° 

 

 

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