By J. L. Meriam, L. G. Kraige
The seventh version of this vintage textual content keeps to supply an identical top of the range fabric obvious in earlier versions. The textual content is generally rewritten with updated prose for content material readability, outstanding new difficulties in new software components, striking guideline on drawing loose physique diagrams, and new digital vitamins to aid readers.
Furthermore, this variation deals extra Web-based challenge fixing to perform fixing difficulties, with instant suggestions; computational mechanics booklets provide flexibility in introducing Matlab, MathCAD, and/or Maple into your mechanics lecture room; digital figures from the textual content to augment lectures through pulling fabric from the textual content into Powerpoint or different lecture codecs; a hundred+ extra digital transparencies provide challenge statements and entirely labored recommendations to be used in lecture or as outdoor learn tools.
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Additional info for Engineering Mechanics: Statics (7th Edition)
Squaring the side length gives an area of 576 mm2. However, according to our rule, we should write the area as 580 mm2, using only two signiﬁcant ﬁgures. When calculations involve small differences in large quantities, greater accuracy in the data is required to achieve a given accuracy in the results. 0112 to three-ﬁgure accuracy. It is often difﬁcult in lengthy computations to know at the outset how many signiﬁcant ﬁgures are needed in the original data to ensure a certain accuracy in the answer.
Because the body falls with an acceleration g, Eq. 1/1 gives W ϭ mg (1/3) The weight W will be in newtons (N) when the mass m is in kilograms (kg) and the acceleration of gravity g is in meters per second squared (m/s2). S. customary units, the weight W will be in pounds (lb) when m is in slugs and g is in feet per second squared. 2 ft/sec2 will be sufﬁciently accurate for our calculations in statics. The true weight (gravitational attraction) and the apparent weight (as measured by a spring scale) are slightly different.
1/2 Determine the magnitude of the vector sum V ϭ V1 ϩ V2 and the angle x which V makes with the positive x-axis. Complete both graphical and algebraic solutions. Problems y V1 = 10 units F F 3 60° 4 x Problem 1/2 1/3 For the given vectors V1 and V2 of Prob. 1/2, determine the magnitude of the vector difference VЈ ϭ V2 Ϫ V1 and the angle x which VЈ makes with the positive x-axis. Complete both graphical and algebraic solutions. 1/4 A force is speciﬁed by the vector F ϭ 120i Ϫ 160j ϩ 80k lb. Calculate the angles made by F with the positive x-, y-, and z-axes.