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International Edition---engineerin...

4th Edition
Andrew Pytel And Jaan Kiusalaas
Publisher: CENGAGE L
ISBN: 9781305501607

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Chapter
Section
BuyFindarrow_forward

International Edition---engineerin...

4th Edition
Andrew Pytel And Jaan Kiusalaas
Publisher: CENGAGE L
ISBN: 9781305501607
Chapter 4, Problem 4.181RP
Textbook Problem
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Determine the ratio P/Q for which the parallel linkage will be in equilibrium in the position shown. Neglect the weights of the members.

Chapter 4, Problem 4.181RP, Determine the ratio P/Q for which the parallel linkage will be in equilibrium in the position shown.

To determine

The ratio P/Q

Explanation of Solution

Given information:

Steps to follow in the equilibrium analysis of a body are:

1. Draw the free body diagram.

2. Write the equilibrium equations.

3. Solve the equations for the unknowns.

Calculation:

FBD of entire body

Assume Ax,Ay,Dx,Dy as the reaction force components at point A and D respectively.

For the equilibrium of entire section, the bending moment about point A is equal to zero.

  MA=0

  Dy(4m)P(4cos60°+2)+Q(6sin60°)=0Dy=P1

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Chapter 4 Solutions

International Edition---engineering Mechanics: Statics, 4th Edition
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Ch. 4 - The figure is a model for member CDE of the frame...Ch. 4 - The homogeneous cylinder of weight Wrests in a...Ch. 4 - Calculate the force P that is required to hold the...Ch. 4 - The 60-lb homogeneous disk is suspended from a...Ch. 4 - The 180-kg uniform boom ABC, supported by a...Ch. 4 - The table lamp consists of two uniform arms, each...Ch. 4 - At what angle will the lamp in Prob. 4.16 be in...Ch. 4 - The bent beam ABC is supported by a pin at B and a...Ch. 4 - Compute all reactions at the base A of the traffic...Ch. 4 - The man is holding up the 35-kg ladder ABC by...Ch. 4 - The 1200-lb homogeneous block is placed on rollers...Ch. 4 - The uniform plank ABC weighs 400 N. It is...Ch. 4 - The center of gravity of the 850-N man is at G. If...Ch. 4 - The homogeneous 340-lb sign is suspended from...Ch. 4 - When the truck is empty, it weighs 6000 lb and its...Ch. 4 - The homogeneous bar AB weighs 25 lb. 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Determine the...Ch. 4 - Find the tension T in the cable when the 180-N...Ch. 4 - The 400-kg drum is held by tongs of negligible...Ch. 4 - Compute the magnitudes of all forces acting on...Ch. 4 - Calculate all forces acting on member CDB.Ch. 4 - The automatic drilling robot must sustain a thrust...Ch. 4 - Determine the clamping (vertical) force applied by...Ch. 4 - Determine the axial force in member BC of the...Ch. 4 - Neglecting friction, determine the relationship...Ch. 4 - Find the magnitudes of the pin reactions at A and...Ch. 4 - The load in the bucket of a skid steer loader is...Ch. 4 - Determine the magnitude of the roller reaction at...Ch. 4 - The tool shown is used to crimp terminals onto...Ch. 4 - The 12-lb force is applied to the handle of the...Ch. 4 - The blade of the bulldozer is rigidly attached to...Ch. 4 - Find the magnitudes of the pin reactions at A, C,...Ch. 4 - The pins at the end of the retaining-ring spreader...Ch. 4 - Determine the magnitudes of the support reactions...Ch. 4 - Find the magnitude of the pin reaction at C....Ch. 4 - For the pliers shown, determine the relationship...Ch. 4 - The device shown is an overload prevention...Ch. 4 - The figure is a schematic of a wire cutter....Ch. 4 - The hinge shown is the type used on the doors of...Ch. 4 - Determine the force in the hydraulic cylinder EF...Ch. 4 - Determine the horizontal force P that would keep...Ch. 4 - Determine the magnitudes of the forces acting on...Ch. 4 - Determine the angle at which the bar AB is in...Ch. 4 - The automobile, with center of gravity at G, is...Ch. 4 - The figure shows a three-pin arch. Determine the...Ch. 4 - The center of gravity of the nonhomogeneous bar AB...Ch. 4 - When suspended from two cables, the rocket assumes...Ch. 4 - The pump oiler is operated by pressing on the...Ch. 4 - The uniform 240-lb bar AB is held in the position...Ch. 4 - Find the force P required to (a) push; and (b)...Ch. 4 - Using the method of joints, calculate the force in...Ch. 4 - Using the method of joints, calculate the force in...Ch. 4 - Using the method of joints, calculate the force in...Ch. 4 - Using the method of joints, calculate the force in...Ch. 4 - Using the method of joints, calculate the force in...Ch. 4 - Using the method of joints, calculate the force in...Ch. 4 - Using the method of joints, calculate the force in...Ch. 4 - Using the method of joints, calculate the force in...Ch. 4 - Using the method of joints, calculate the force in...Ch. 4 - Using the method of joints, calculate the force in...Ch. 4 - Identify all the zero-force members in the four...Ch. 4 - The walkway ABC of the footbridge is stiffened by...Ch. 4 - Find the force in member EF.Ch. 4 - Determine the forces in members AE, BE, and ED.Ch. 4 - Determine the reaction at E and the force in each...Ch. 4 - Determine the force in member AD of the truss.Ch. 4 - Determine the force in member BE of the truss.Ch. 4 - Show that all diagonal members of the truss carry...Ch. 4 - Determine the forces in members FG and AB in terms...Ch. 4 - Determine the forces in members BC, BG, and FG.Ch. 4 - Determine the forces in members EF, BF, and BC.Ch. 4 - Compute the forces in members EF, NE and NO.Ch. 4 - Repeat Prob. 4.152 assuming that the 400-kN force...Ch. 4 - Determine the forces in members BG, CI, and CD.Ch. 4 - Assuming that P=48000lb and that it may be applied...Ch. 4 - Calculate the forces in members BC, CF, and FG.Ch. 4 - Find the forces in members CD, DH, and HI.Ch. 4 - Determine the forces in members CD and DF.Ch. 4 - Compute the forces in members CD and JK, given...Ch. 4 - If PCD=6000lb and PGD=1000lb (both compression),...Ch. 4 - Determine the forces in members EF, BF, and BC.Ch. 4 - Determine the forces in members AC, AD, and DE.Ch. 4 - Determine the forces in members GI, PH, and GH....Ch. 4 - Determine the forces in members CD, IJ, and NJ of...Ch. 4 - Calculate the forces in members AB and DE.Ch. 4 - (a) Find the forces in members CE, CF, and DF. (b)...Ch. 4 - Determine the forces in members BC and BE and the...Ch. 4 - A couple acting on the winch at G slowly raises...Ch. 4 - The uniform, 20-kg bar is placed between two...Ch. 4 - The 320-lb homogeneous spool is placed on the...Ch. 4 - Determine the magnitude of the pin reaction at A,...Ch. 4 - Determine the couple C that will hold the bar AB...Ch. 4 - The 800-lb force is applied to the pin at E....Ch. 4 - The weight W=6kN hangs from the cable which passes...Ch. 4 - The 2000-lb and 6000-lb forces are applied to the...Ch. 4 - The two couples act at the midpoints of bars AB...Ch. 4 - Determine the forces in members AC and AD of the...Ch. 4 - Determine the angle for which the uniform bar of...Ch. 4 - Determine the magnitude of the force exerted by...Ch. 4 - Calculate the forces in members (a) DE; (b) BE;...Ch. 4 - Determine the ratio P/Q for which the parallel...Ch. 4 - The 30-lb block C rests on the uniform 14-lb bar...Ch. 4 - The 30-lb homogeneous bar AB supports the 60-lb...Ch. 4 - Determine the forces in members (a) EF; and (b)...Ch. 4 - Find the magnitude of the pin reaction at B caused...Ch. 4 - The breaking strength of the cable FG that...Ch. 4 - Determine the forces in members GH, BH, and BC of...Ch. 4 - The 80-N force is applied to the handle of the...Ch. 4 - The tongs shown are designed for lifting blocks of...

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