Statics and Mechanics of Materials (5th Edition)
5th Edition
ISBN: 9780134382593
Author: Russell C. Hibbeler
Publisher: PEARSON
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Textbook Question
Chapter 4.8, Problem 43P
The tractor exerts a towing force T = 400 lb. Determine the normal reactions at each of the two front and two rear tires and the tractive frictional force F on each rear tire needed to pull the load forward at constant velocity. The tractor has a weight of 7500 lb and a center of gravity, located at GT. An additional weight of 600 lb is added to its front having a center of gravity at GA. Take μs = 0.4. The front wheels are free to roll.
Prob. 4-43
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Students have asked these similar questions
Pro 12 The tractor exerts a towing force of
T=500 lb. There are two front and two rear
tires which provide normal reactions, and the
tractive friction F exists only on the two rear
tires. Also, discuss whether it will move or
not. The tractor has a weight of 7000 lb and a
center of graviry at Gr. An additional weight
of 600 lb is added to its front for stability,
which is indicated by GA. Take us = 0.4. The
front wheels are free to roll.
TA
2.5 ft.
다
A
3 m
Determine the horizontal force P to start the 400-N wedge moving to the right. The angle of
friction for all contact surfaces is o = 20°.
WA = 2000 N
WB = 400 N
15°
4. The mine car and its
contents have a total mass of
6000 kg and a centre of
gravity at G. If the coefficient
of static friction
10 kN
between the wheels and the
0.9 m
•G
tracks is u = 0.4 when the
wheels are locked, find the
normal force acting on the
front wheels at B and the rear
0.15 m
0.6 m -
1.5 m
wheels at A when the brakes
at both A and B are locked.
Does the car move?
[Ans. NA = 16.5 kN, Ng =42.3
kN, the car does not move]
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Chapter 4 Solutions
Statics and Mechanics of Materials (5th Edition)
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