Statics and Mechanics of Materials
2nd Edition
ISBN: 9780073398167
Author: Ferdinand P. Beer, E. Russell Johnston Jr., John T. DeWolf, David Mazurek
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 3.2, Problem 37P
A farmer uses cables and winch pullers B and E to plumb one side of a small bam. If it is that the sum of the moments about the x axis of the forces exerted by the cables on the barn at points A and D is equal to
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A farmer uses cables and winch pullers B and E to plumb one side of a small barn. If it is known that the sum of the moments about the x axis of the forces exerted by the cables on the barn at points A and D is equal to 4728 lb·ft, determine the magnitude of TDE when TAB=255 lb.
A farmer uses cables and winch pullers B and E to plumb one side of a small barn. If it is known that the sum of the moments about the X axis of the forces exerted by the cables on the barn at points A and D is equal to 4728 lb·ft, determine the magnitude of TDE when TAB = 255 lb.
Q1: A prybar is used to remove a nail as shown. Determine the moment of the 80-lb force about the point O of contact
between the prybar and the small support block (
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Chapter 3 Solutions
Statics and Mechanics of Materials
Ch. 3.1 - A 20-lb force is applied to the control rod AB as...Ch. 3.1 - A 20-lb force is applied to the control rod AB as...Ch. 3.1 - A 300-N force P is applied at point A of the bell...Ch. 3.1 - A 400-N force P is applied at point A of the bell...Ch. 3.1 - A 300-N force is applied at A as shown. Determine...Ch. 3.1 - A 300-N force is applied at A as shown. Determine...Ch. 3.1 - 3.7 and 3.8 The tailgate of a car is supported by...Ch. 3.1 - 3.7 and 3.8 The tailgate of a car is supported by...Ch. 3.1 - 3.9 and 3.10 It is known that the connecting rod...Ch. 3.1 - 3.9 and 3.10 It is known that the connecting rod...
Ch. 3.1 - Rod AB is held in place by the cord AC. Knowing...Ch. 3.1 - Prob. 12PCh. 3.1 - Determine the moment about the origin O of the...Ch. 3.1 - Determine the moment about the origin O of the...Ch. 3.1 - Prob. 15PCh. 3.1 - Prob. 16PCh. 3.1 - Prob. 17PCh. 3.1 - A wooden board AB, which is used as a temporary...Ch. 3.1 - Prob. 19PCh. 3.1 - A small boat hangs from two davits, one of which...Ch. 3.1 - Prob. 21PCh. 3.1 - In Prob. 3.16, determine the perpendicular...Ch. 3.1 - In Prob. 3.16, determine the perpendicular...Ch. 3.1 - In Prob. 3.20, determine the perpendicular...Ch. 3.2 - Given the vectors P=3i-j+2k,Q=4i+5j-3k, and...Ch. 3.2 - Prob. 26PCh. 3.2 - Knowing that the tension in cable AC is 1260 N,...Ch. 3.2 - Knowing that the tension in cable AD is 405 N,...Ch. 3.2 - Three cables are used to support a container as...Ch. 3.2 - Three cables are used to support a container as...Ch. 3.2 - The 20-in. tube AB can slide along a horizontal...Ch. 3.2 - Solve Prob. 3.31 for the position corresponding to...Ch. 3.2 - Prob. 33PCh. 3.2 - Prob. 34PCh. 3.2 - Knowing that the tension in cable AB is 570 N,...Ch. 3.2 - Prob. 36PCh. 3.2 - A farmer uses cables and winch pullers B and E to...Ch. 3.2 - Solve Prob. 3.37 when the tension in cable AB is...Ch. 3.2 - To lift a heavy crate, a man uses a block and...Ch. 3.2 - Prob. 40PCh. 3.2 - Prob. 41PCh. 3.2 - Prob. 42PCh. 3.2 - Prob. 43PCh. 3.2 - A sign erected on uneven ground is guyed by cables...Ch. 3.2 - The frame ACD is hinged at and D and is supported...Ch. 3.2 - In Prob. 3.45, determine the moment about the...Ch. 3.2 - Prob. 47PCh. 3.2 - Prob. 48PCh. 3.3 - Two parallel 60-N forces are applied to a lever as...Ch. 3.3 - A plate in the shape of a parallelogram is acted...Ch. 3.3 - Prob. 51PCh. 3.3 - Prob. 52PCh. 3.3 - Four 112-in. -diameter pegs are attached to a...Ch. 3.3 - Prob. 54PCh. 3.3 - Prob. 55PCh. 3.3 - Prob. 56PCh. 3.3 - Replace the two couples shown with a single...Ch. 3.3 - Prob. 58PCh. 3.3 - Shafts A and B connect the gear box to the wheel...Ch. 3.3 - Prob. 60PCh. 3.3 - Prob. 61PCh. 3.3 - The force P has a magnitude of 250 N and is...Ch. 3.3 - Prob. 63PCh. 3.3 - A 260-lb force is applied at A to the rolled-steel...Ch. 3.3 - Prob. 65PCh. 3.3 - A force and couple act as shown on a square plate...Ch. 3.3 - Prob. 67PCh. 3.3 - Prob. 68PCh. 3.3 - Prob. 69PCh. 3.3 - Replace the 150-N force by an equivalent...Ch. 3.3 - Prob. 71PCh. 3.3 - Prob. 72PCh. 3.4 - A 4-m-long beam is subjected to a variety of...Ch. 3.4 - Prob. 74PCh. 3.4 - Determine the single equivalent force and the...Ch. 3.4 - The weights of two children sitting at ends A and...Ch. 3.4 - Prob. 77PCh. 3.4 - Prob. 78PCh. 3.4 - Four forces act on a 700375 -mm plate as shown....Ch. 3.4 - Prob. 80PCh. 3.4 - Prob. 81PCh. 3.4 - A truss supports the loading shown. Determine the...Ch. 3.4 - A machine component is subjected to the forces and...Ch. 3.4 - Solve Prob. 3.83, assuming that P=60N.Ch. 3.4 - Prob. 85PCh. 3.4 - Prob. 86PCh. 3.4 - Prob. 87PCh. 3.4 - Prob. 88PCh. 3.4 - Prob. 89PCh. 3.4 - Assuming e 600 in Prob. 3.89, replace the two...Ch. 3.4 - A blade held in a brace is used to tighten a screw...Ch. 3.4 - Prob. 92PCh. 3.4 - Four signs are mounted on a frame spanning a...Ch. 3.4 - Prob. 94PCh. 3.4 - Prob. 95PCh. 3.4 - Three children are standing on a 55-m raft. The...Ch. 3 - For the shift lever shown, determine the magnitude...Ch. 3 - Consider the volleyball net shown. Determine the...Ch. 3 - A crane is oriented so that the end of the 25-m...Ch. 3 - The 25-m crane boom AO lies in the yz plane....Ch. 3 - A single force P acts at C in a direction...Ch. 3 - While tapping a hole, a machinist applies the...Ch. 3 - A 500-N force is applied to a bent plate as shown....Ch. 3 - Prob. 104RPCh. 3 - Prob. 105RPCh. 3 - Prob. 106RPCh. 3 - Prob. 107RPCh. 3 - A regular tetrahedron has six edges of length a. A...
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- Determine the (magnitude) of the moment about line AD of the 750-lb tension in cable CE. Z 3 ft 2 ft A 8 ft 6 ft. E D 4 ft 2 ft B 5 ft Xarrow_forwardA farmer uses cables and winch pullers B and E to plumb one side of a small barn. If it is known that the sum of the moments about the x-axis of the forces exerted by the cables on the barn at points A and D is equal to 4737.5 lb-ft, determine the magnitude of TDE when TAB = 255 lb. The magnitude of TDE is 1 ft 12 ft 1.5 ft lb. 14 ft E F 12 ft xarrow_forwardProblems: 1. A 30-lb force acts on the end of the 3-ft lever as shown. Determine the moment of the force about O. 20° A 30 lb 3 ft 50°arrow_forward
- As a trailer is towed, the force F = 120 lb is applied to the ball of the trailer hitch as shown. Determine the magnitude of the moment of F about O assuming counterclockwise is positive. Express your answer in units of in-lb. F = 120 lb 1.25"- A 25 0 11" 1.5"arrow_forward4. A machine component is subjected to the forces and couples as shown. If P = 60 N, determine the magnitude and direction of the resultant force as well as the location where the resultant force passes through vertical line GF and horizontal line GH. 15 200 N 50 mm 520 mm E 50 mm 240 mm 42 N-m D 120 N 70⁰ 40 N-m 640 mm H 80 N 180 mm B +50mm Ans: (a) 0.365 m above G (b) 0.227 m to the right of Garrow_forwardA gate is held in the position shown by cable AB. If the tension in the cable is 6.75 kN, determine the magnitude of the moment of the tension (as applied to point A) about the pivot point O of the gate. Assume counterclockwise is positive. Express your answer in units of kN-m. 7m B -2 m 6 m 55° I I A 0.4 m x +---- 0.5 marrow_forward
- An overhead view of a door is shown. If the compressive force F acting in the coupler arm of the hydraulic door closer is 17 lb for the orientation shown, determine the magnitude of the moment of this force about the hinge axis O assuming counterclockwise is positive. Express your answer in units of in-lb. 1⁄/″ 3" 8 1 1" 12" 1250 B F = 17 lbarrow_forward50° 15 N 150 mm E B D 10 N Three forces and a couple act on crank ABC. Determine the value of d so that the given system of forces is equivalent to zero at point B, 6.25 N-m 150 mm-200 mm- Carrow_forwardTwo squirrels sit on a rope. Squirrel A weighs 28 oz, and squirrel B weighs 24 oz. The rope has a diameter of 0.04 inches, and forms angles of θ = 2.2 degrees and ϕ = 2.5 degrees as shown. I need to find the tensions in each rope.arrow_forward
- The magnitude of the moment of force P about point O is 200 kN • m. Determine the magnitude of P.arrow_forwardThe horizontal top of a concrete column is subjected to the system of forces shown. Represent the resultant of all forces as a force R at point O and a couple M. Also specify the magnitudes of R and M. 5 kN 0.5 m 3 kN 0.5 m 3 kN 0.5 m 2 kN 0.2 m 3 kN 1 kN 1 kN 2 kN Fozm 0.2 m 0.2 m Answers: R = ( i i+ i j+ i k) kN M = ( i i+ i j+ i k) kN-m R = i kN M = kN.marrow_forwardB 4. The man pulls on the rope at C with a force FA of 70 lb which causes the forces FA and FC Fc at B to have this same magnitude. 8 ft Determine the magnitude and coordinate 5t direction angles of the resultant force 5 ft, 1 ft acting at B. 7 ft 4 ft 7 ft 5 ftarrow_forward
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How to balance a see saw using moments example problem; Author: Engineer4Free;https://www.youtube.com/watch?v=d7tX37j-iHU;License: Standard Youtube License