ENGINEERING MECHANICS - STATICS AND DYNAMICS (12TH EDITION): PART 1

= M y = ( r A × F v ) ⋅ j M y = − 78.384 lb ft ⋅
Problem 4-59
The lug nut on the wheel of the automobile is to be removed using the wrench and applying the
vertical force F at A . Determine if this force is adequate, provided a torque M about the x axis is

The three concurrent forces acting on the post produce a resultant force F R = 0. If F 2 = (1/2)F 1 , and F 1 is to be 90° from F 2 as shown, determine the required magnitude F 3 expressed in terms of F 1 and the angle θ .
Solution: Use the primed co[r]

Problem 10-104
The wheel consists of a thin ring having a mass M 1 and four spokes made from slender rods, each having a mass M 2 . Determine the wheel’s moment of inertia about an axis perpendicular to the page
and passing through point A. Given:

Determine the distance y c to the centroid of the area and then calculate the moments of inertia
I u and I v for the channel`s cross-sectional area. The u and v axes have their origin at the centroid C . For the calculation, assume all corners to be square.
Given:

Determine the force P acting on the cord which is required to maintain equilibrium of the horizontal bar
CB of mass M . Hint: First show that the coordinates s A and s B are related to the constant vertical length l of the cord by the equation 5 s B − s A = L .
Given:

Screws. Chapter 17, Friction Clutches, and Chap. 18, Friction Brakes, both contain an
extensive presentation of these two important mechanical subsystems. Included are the types of clutches and brakes, materials, thermal considerations, and application to various transmission[r]

F. Beer, E. R. Johnston Jr., D. Mazurek, Vector of Mechanics for Engineers, Statics & Dynamics, McGraw-Hill, 2013
TRỌNG TAM
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VD 1: Một thanh mảnh đồng chất trọng lượng w có dạng nửa đường tròn bánh kính r. Thanh được liên kết với giá cố định bằng chốt b[r]

HCM City Univ. of Technology, Faculty of Mechanical Engineering Nguyen Tan Tien
§2. Free-Body Diagram
- A Free-Body Diagram : a sketch of the isolated or free body
which shows all the pertinent weight forces, the externally applied loads, and the reacti[r]

Problem 2-106
The chandelier is supported by three chains which are concurrent at point O . If the resultant force at O has magnitude F R and is directed along the negative z axis, determine the force in each chain assuming F A = F B = F C = F .

lb =
Problem 5-91
The shaft assembly is supported by two smooth journal bearings A and B and a short link DC. If a couple moment is applied to the shaft as shown, determine the components of force reaction at the bearings and the force in the link. The link lies in a plane p[r]

Problem 8-76
The machine part is held in place using the double-end clamp.The bolt at B has square threads with a mean radius r and a lead r 1 , and the coefficient of static friction with the nut is μ s . If a torque M is applied to the nut to tighten it, de[r]

Problem 5-62
The disk has mass M and is supported on the smooth cylindrical surface by a spring having stiffness k and unstretched length l 0 . The spring remains in the horizontal position since its end A is attached to the small roller guide which has negligible weight. Determine t[r]

Now find the magnitude of the resultant force.
F R = F 1v + F 2v + F 3v F R = 462.9 lb
Problem 2-51
Determine the magnitude of force F so that the resultant F R of the three forces is as small as possible. What is the minimum magnitude of F R ?

U S E O F T H E I N S T R U C T O R ’ S M A N U A L
The problem solution portion of this manual has been prepared for the instructor who wishes to occasionally refer to the authors’ method of solution or who wishes to check the answer of his (her) solution with the re[r]