EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 12, Problem 87GP
Assume that a single-span suspension bridge such as the Golden Gate Bridge has the symmetrical configuration indicated in Fig. 12–79. Assume that the roadway is uniform over the length of the bridge and that each segment of the suspension cable provides the sole support for the roadway directly below it. The ends of the cable are anchored to the ground only, not to the roadway. What must the ratio of d2 to d1 be so that the suspension cable exerts no net horizontal force on the towers? Neglect the mass of the cables and the fact that the roadway isn’t precisely horizontal.
FIGURE 12–79 Problems 64 and 65.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
-
5. Two identical, uniform beams of length 3 m and weighing 260 N each are
connected at one end by a frictionless hinge. A light horizontal crossbar, attached at the
midpoints of the beams maintains an angle 50° between the beams. The beams are
suspended from the ceiling by vertical wires so they form a V. See figure. (a) What force
does the crossbar exert on each beam? (b) Is the crossbar under compression or tension,
i.e. are the ends of the crossbar being pushed together or stretched farther apart? (c) What
force (magnitude and direction) does the hinge exert on each beam?
Crossbar
Hinge
1. (1) Three forces are applied to a tree sapling, as shown in
Fig. 12-45, to stabilize it. If FA = 385 N and FB = 475 N,
find Fe in magnitude and direction.
FB
FIGURE 12-45 FC
Problem 1.
FIGURE 12-46
Problem 2.
2. (1) Approximately what magnitude force, FM, must the
extensor muscle in the upper arm exert on the lower arm to
hold a 7.3-kg shot put (Fig. 12-46)? Assume the lower arm
has a mass of 2.3 kg and its CG is 12.0 cm from the elbow-joint
pivot.
2.5 cm
FM
-30.0 cm-
105°
Elbow
joint
FA
(24) Assuming the lower arm has a mass of 2.8 kg and its CG is 12 cm from the elbow-
joint pivot, how much force must the extensor muscle in the upper arm exert on
the lower arm to hold a 7.5 kg shot put (Fig. 12-7)? 11)
2.5 cm
F
M
A) 100 N
30.0 cm-
Elbow
joint
B) 750 N
C) 1500 N
D) 500 N
E) 1000 N
Chapter 12 Solutions
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
Ch. 12.1 - Prob. 1AECh. 12.2 - We did not need to use the force equation to solve...Ch. 12.2 - CHAPTER-OPENING QUESTIONGuess Now! The diving...Ch. 12.2 - Why is it reasonable to ignore friction along the...Ch. 12.3 - Prob. 1EECh. 12.5 - Two steel wires have the same length and are under...Ch. 12 - Describe several situations in which an object is...Ch. 12 - A bungee jumper momentarily comes to rest at the...Ch. 12 - Prob. 3QCh. 12 - Your doctors scale has arms on which weights slide...
Ch. 12 - A ground retaining wall is shown in Fig. 1240a....Ch. 12 - Can the sum of the torques on an object be zero...Ch. 12 - A ladder, leaning against a wall, makes a 60 angle...Ch. 12 - Prob. 8QCh. 12 - Prob. 9QCh. 12 - Place yourself facing the edge of an open door....Ch. 12 - Prob. 11QCh. 12 - Prob. 12QCh. 12 - Prob. 13QCh. 12 - Which of the configurations of brick, (a) or (b)...Ch. 12 - Is the Youngs modulus for a bungee cord smaller or...Ch. 12 - Examine how a pair of scissors or shears cuts...Ch. 12 - Materials such as ordinary concrete and stone are...Ch. 12 - Prob. 1MCQCh. 12 - Prob. 2MCQCh. 12 - Prob. 3MCQCh. 12 - Prob. 4MCQCh. 12 - Prob. 5MCQCh. 12 - Prob. 6MCQCh. 12 - Prob. 7MCQCh. 12 - Prob. 8MCQCh. 12 - Prob. 9MCQCh. 12 - Prob. 10MCQCh. 12 - Prob. 11MCQCh. 12 - (I) A tower crane (Fig. 1248a) must always be...Ch. 12 - Prob. 2PCh. 12 - Prob. 3PCh. 12 - Prob. 4PCh. 12 - (II) Calculate the forces FA and FB that the...Ch. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - Prob. 8PCh. 12 - Prob. 9PCh. 12 - (II) Find the tension in the two wires supporting...Ch. 12 - Prob. 12PCh. 12 - (II) The force required to pull the cork out of...Ch. 12 - Prob. 14PCh. 12 - (II) Three children are trying to balance on a...Ch. 12 - Prob. 16PCh. 12 - (II) A traffic light hangs from a pole as shown in...Ch. 12 - Prob. 18PCh. 12 - Prob. 19PCh. 12 - Prob. 20PCh. 12 - Prob. 21PCh. 12 - Prob. 22PCh. 12 - Prob. 23PCh. 12 - (III) A door 2.30 m high and 1.30 m wide has a...Ch. 12 - Prob. 25PCh. 12 - Prob. 26PCh. 12 - Prob. 27PCh. 12 - (III) A uniform ladder of mass m and length leans...Ch. 12 - (III) A refrigerator is approximately a uniform...Ch. 12 - (III) A 56.0-kg person stands 2.0 m from the...Ch. 12 - Prob. 31PCh. 12 - Prob. 33PCh. 12 - Prob. 34PCh. 12 - Prob. 35PCh. 12 - Prob. 36PCh. 12 - Prob. 37PCh. 12 - Prob. 38PCh. 12 - Prob. 39PCh. 12 - Prob. 40PCh. 12 - (I) A sign (mass 1700 kg) hangs from the end of a...Ch. 12 - Prob. 42PCh. 12 - (II) How much pressure is needed to compress the...Ch. 12 - (II) At depths of 2000 m in the sea, the pressure...Ch. 12 - Prob. 45PCh. 12 - (I) The femur bone in the human leg has a minimum...Ch. 12 - Prob. 47PCh. 12 - (II) (a) What is the maximum tension possible in a...Ch. 12 - (II) If a compressive force of 3.3 104 N is...Ch. 12 - Prob. 50PCh. 12 - (II) Assume the supports of the uniform cantilever...Ch. 12 - Prob. 52PCh. 12 - Prob. 53PCh. 12 - Prob. 54PCh. 12 - Prob. 55PCh. 12 - (III) The truss shown in Fig. 1272 supports a...Ch. 12 - (II) How high must a pointed arch be if it is to...Ch. 12 - Prob. 60GPCh. 12 - A cube of side l rests on a rough floor. It is...Ch. 12 - Prob. 62GPCh. 12 - When a wood shelf of mass 6.6 kg is fastened...Ch. 12 - Prob. 64GPCh. 12 - Prob. 67GPCh. 12 - The mobile in Fig. 1274 is in equilibrium. Object...Ch. 12 - A 65.0-kg painter is on a uniform 25-kg scaffold...Ch. 12 - Prob. 70GPCh. 12 - Prob. 73GPCh. 12 - Prob. 74GPCh. 12 - Prob. 76GPCh. 12 - Prob. 77GPCh. 12 - Prob. 78GPCh. 12 - Prob. 79GPCh. 12 - Parachutists whose chutes have failed to open have...Ch. 12 - Prob. 81GPCh. 12 - One rod of the square frame shown in Fig. 1295...Ch. 12 - A uniform beam of mass M and length l is mounted...Ch. 12 - Prob. 84GPCh. 12 - A uniform 6.0-m-long ladder of mass 16.0 kg leans...Ch. 12 - In Fig. 1279, consider the right-hand...Ch. 12 - Assume that a single-span suspension bridge such...Ch. 12 - A uniform sphere of weight mg and radius r0 is...Ch. 12 - A uniform ladder of mass m and length leans at an...Ch. 12 - Prob. 90GPCh. 12 - Prob. 91GPCh. 12 - A 23-kg sphere rests between two smooth planes as...Ch. 12 - Prob. 93GPCh. 12 - Prob. 94GPCh. 12 - Prob. 95GP
Additional Science Textbook Solutions
Find more solutions based on key concepts
EVOLUTION CONNECTION The percentages of naturally occurring elements making up the human body (see Table 2.1) a...
Campbell Biology (11th Edition)
What are the minimum and maximum ages of the island of Kauai? Minimum age: ______million yr Maximum age: ______...
Applications and Investigations in Earth Science (9th Edition)
Explain all answers clearly, with complete sentences and proper essay structure if needed. An asterisk (*) desi...
Cosmic Perspective Fundamentals
Acetobacter is necessary for only one of the steps of vitamin C manufacture. The easiest way to accomplish this...
Microbiology: An Introduction
Albinism in humans is inherited as a simple recessive trait. For the following families, determine the genotype...
Concepts of Genetics (12th Edition)
Distinguish between microevolution, speciation, and macroevolution.
Campbell Essential Biology (7th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- 17-45. The drop gate at the end of the trailer has a mass of 1.25 Mg and mass center at G. If it is supported by the cable AB and hinge at C, determine the tension in the cable when the truck begins to accelerate at 5 m/s?. Also, what are the horizontal and vertical components of reaction at the hinge C? 30 1.5 m 45°arrow_forward1 Figure 12-15 shows three situations in which the same horizontal rod is supported by a hinge on a wall at one end and a cord at its other end. Without written calculation, rank the situa- tions according to the magnitudes of (a) the force on the rod from the cord, (b) the vertical force on the rod from the hinge, and (c) the horizontal force on the rod from the hinge, greatest first. Бо° 50° (1) (2) (3)arrow_forwardKPECTED HAS OCCU... Subject ystem S- rchpool.sona- ems.com man Subject Pool tem Department... 6³ 2 [108 W 24,919 Xx :8: F2 3 6. A 150 kg uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. Calculate the magnitude of the tension in the wire if the angle between the cable and the horizontal is 8 = 46°. X 1832.64 N E 20 F3 $ 4 R HEATRA MAL 2 7 F4 % 5 T F5 ^ 6 tv ♫ MacBook Air F6 Y & 7 44 F7 U M M | L T E 10 * 8 0 30.0⁰ DII F8 ( 9 Beam A DD F9 O O W F10 zoom B P C F11 ISUIH by mi 04 M vauies or roc puffer d + = F12 deletearrow_forward
- (c) Find the vertical force exerted on the base of the rod. Ignore the weight of the rod. magnitude _____ N direction _____ upwards or downward?arrow_forwardA uniform sign of weight Fg and width 2L hangs from a light, horizontal beam hinged at the wall and supported by a cable (as shown). Determine (a) the tension in the cable and (b) the components of the reaction force exerted by the wall on the beam in terms of Fg , d, L, and θ.arrow_forwarda 1001 N uniform beam is attached to a vertical wall at one end and js supported by a cable at the other end 1550 N crate hangs from the far end of the beam find the magnitude if the tension in the wire the angle theta is 21 degrees and phi is 32 degrees length of beam is Larrow_forward
- An angler hangs a 4.50 kg fish from a vertical steel wire 1.50 m long and 5.00 * 10-3 cm2 in cross-sectional area. The upper end of the wire is securely fastened to a support. (a) Calculate the amount the wire is stretched by the hanging fish. The angler now applies a varying force F at the lower end of the wire, pulling it very slowly downward by 0.500 mm from its equilibrium position. For this downward motion, calculate (b) the work done by gravity; (c) the work done by the force F S ; (d) the work done by the force the wire exerts on the fish; and (e) the change in the elastic potential energy (the potential energy associated with the tensile stress in the wire). Compare the answers in parts (d) and (e).arrow_forward1. A crowbar lifts a weight in Fig. 10-21 below. A downward force on the long end of the crowbar, F₁, equals 225 N. How much weight must be held up by the upward force, F2, being exerted by the short end? The value of r₁-perpendicular is equal to 0.300 m and that of r₂-perpendicular is 0.0500 m. Ans. 1350 N upward. 冰 5.00 cm 30.0 cm- Fig. 10-21arrow_forwardA uniform rod is attached to a wall by a hinge at its base. The rod has a mass of 7.5 kg, a length of 2.3 m, is at an angle of 29° above the horizontal, and is held in place by a horizontal cord attached to the other end of the rod and bolted to the wall above the base of the rod. (a) Determine the tension in the cord. 63.715 X Where is a convenient point about which to take the torques? See if you can write an expression for the torque in terms of the force producing the torque and the perpendicular distance from the line of action of the force to the point about which we have specified to determine the torque. See if you can write a second condition of equilibrium that will allow you to determine the tension in the cord. N (b) Determine the horizontal and vertical components of the force exerted on the rod by the hinge. 36.788 X FH = Now that you know the tension in the cord from part (a), see if you can write a first condition of equilibrium statement that will allow you to…arrow_forward
- One end of a uniform l = 3.80 m long rod of weight supported by an angle of theta = 37 degrees with the rod. The other end rests against a wall, where held by friction (se ). coefficient of static friction between the wall and rod mu i =0.575 Determine the minimum distance from an additional welght (same the weight of the rod) can hung without causing the rod to point a.arrow_forwardIn the figure, one end of a uniform beam of weight 100 N is hinged to a wall; the other end is supported by a wire that makes angles 8- 29 with both wall and beam. Find (a) the tension in the wire and the (b) horizontal anid (c) vertical components of the force of the hinge on the beam. Hinge (a) Number Units Units (b) Number Units (c) Nurmiberarrow_forwardA uniform ladder rests against a smooth vertical wall and on a rough horizontal ground. The weight of the ladder is 10N and it is just about to slip when inclined 30 degrees to the vertical. Calculate the coefficient of friction Friesarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Static Equilibrium: concept; Author: Jennifer Cash;https://www.youtube.com/watch?v=0BIgFKVnlBU;License: Standard YouTube License, CC-BY