1.31 & Number of independent scalar equations from one vector equation. (Section 2.9.5) Consider the vector equation shown to the right that can be useful for static analyses of any system S. System type 1D (line) Integer(s) Complete the blanks in the table to the right with all integers that could be equal to the number of independent scalar equations produced by the previous vector equation for any system S. 2D (planar) Hint: See Homework 1.30 for ideas. 3D (spatial) Note: Regard ID/linear as meaning F whereas 2D/planar means F can be expressed in terms of two non-parallel unit vectors i and j, and 3D/spatial means F can be expressed in terms of three non-coplanar unit vectors i, j, k. can be expressed in terms of a single unit vector i

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
icon
Related questions
Question
From 1.31 1.32 and 1.33 show all work
1.31 4 Number of independent scalar equations from one vector equation. (Section 2.9.5)
Consider the vector equation shown to the right that can be useful
for static analyses of any system S.
System type
Integer(s)
Complete the blanks in the table to the right with all integers that
could be equal to the number of independent scalar equations
produced by the previous vector equation for any system S.
1D (line)
2D (planar)
Hint: See Homework 1.30 for ideas.
3D (spatial)
Note: Regard 1D/linear as meaning F can be expressed in terms of a single unit vector i
whereas 2D/planar means F can be expressed in terms of two non-parallel unit vectors î and j,
and 3D/spatial means F can be expressed in terms of three non-coplanar unit vectors î, j, k.
1.32 4 Vector concepts: Solving a vector equation (just circle true or false and fill-in the blank).
Consider the following vector equation written in terms of the scalars r, y, z
and three unique non-orthogonal coplanar unit vectors â1, â2, â3.
(2x – 4) â1 + (3 y – 9) âz + (4z – 16) âz = ō
The unique solution to this vector equation is r = 2, y = 3, z = 4. True/False.
Explain: âz can be expressed in terms of ấ¡ and âg (i.e., âz is a linear combination of â1 and âs).
Hence the vector equation produces
linearly independent scalar equations.
1.33 A vector revolution in geometry. (Chapter 2)
The relatively new invention of vectors (Gibbs z 1900 AD) has revolutionized Euclidean geometry
(Euclid z 300 BC). For each geometrical quantity below, circle the vector operation(s) (either the
dot-product, cross-product, or both) that is most useful for their calculation.
Length:
Angle:
Area:
Volume:
1.34 † Microphone cable lengths (non-orthogonal walls) "It's just geometry". Show work.
A microphone Q is attached to three pegs A, B, C by three cables. Knowing the peg locations,
microphone location, and the angle 0 between the vertical walls, express LA, LB, LC solely in terms
of numbers and 0. Next, complete the table by calculating LB when 0 = 120°.
Hint: To do this efficiently, use only unit vectors û, v, w, and do not introduce an orthogonal set of unit vectors.
Hint: Use the distributive property of the vector dot-product as shown in Section 2.9.1 and Homework 2.4.
Note: Synthesis problems are difficult. Engineers solve problems. Think, talk, draw, sleep, walk, get help, .
Distance between A and B
20 m
15----------
Distance between B and C
Distance between N, and B
15 m
8 m
7 m
Distance along back wall (see picture)
Q's height above N.
Distance along side wall (see picture)
5 m
8 m
LA: Length of cable joining A and Q
LB: Length of cable joining B and Q
Le: Length of cable joining C and Q
16.9 m
8.1 m
14.2 m
1.
Note: The floor is horizontal, the walls are vertical.
Q/ No = 7û + 5ý + 8 w
Result:
LA =
202 168 cos(0)
LB =
Lc = V137 -
cos(0)
62
Homework 1: Vectors - basis independent
Copyright © 1992-2017 Paul Mitiguy. All rights reserved.
目回回
Transcribed Image Text:1.31 4 Number of independent scalar equations from one vector equation. (Section 2.9.5) Consider the vector equation shown to the right that can be useful for static analyses of any system S. System type Integer(s) Complete the blanks in the table to the right with all integers that could be equal to the number of independent scalar equations produced by the previous vector equation for any system S. 1D (line) 2D (planar) Hint: See Homework 1.30 for ideas. 3D (spatial) Note: Regard 1D/linear as meaning F can be expressed in terms of a single unit vector i whereas 2D/planar means F can be expressed in terms of two non-parallel unit vectors î and j, and 3D/spatial means F can be expressed in terms of three non-coplanar unit vectors î, j, k. 1.32 4 Vector concepts: Solving a vector equation (just circle true or false and fill-in the blank). Consider the following vector equation written in terms of the scalars r, y, z and three unique non-orthogonal coplanar unit vectors â1, â2, â3. (2x – 4) â1 + (3 y – 9) âz + (4z – 16) âz = ō The unique solution to this vector equation is r = 2, y = 3, z = 4. True/False. Explain: âz can be expressed in terms of ấ¡ and âg (i.e., âz is a linear combination of â1 and âs). Hence the vector equation produces linearly independent scalar equations. 1.33 A vector revolution in geometry. (Chapter 2) The relatively new invention of vectors (Gibbs z 1900 AD) has revolutionized Euclidean geometry (Euclid z 300 BC). For each geometrical quantity below, circle the vector operation(s) (either the dot-product, cross-product, or both) that is most useful for their calculation. Length: Angle: Area: Volume: 1.34 † Microphone cable lengths (non-orthogonal walls) "It's just geometry". Show work. A microphone Q is attached to three pegs A, B, C by three cables. Knowing the peg locations, microphone location, and the angle 0 between the vertical walls, express LA, LB, LC solely in terms of numbers and 0. Next, complete the table by calculating LB when 0 = 120°. Hint: To do this efficiently, use only unit vectors û, v, w, and do not introduce an orthogonal set of unit vectors. Hint: Use the distributive property of the vector dot-product as shown in Section 2.9.1 and Homework 2.4. Note: Synthesis problems are difficult. Engineers solve problems. Think, talk, draw, sleep, walk, get help, . Distance between A and B 20 m 15---------- Distance between B and C Distance between N, and B 15 m 8 m 7 m Distance along back wall (see picture) Q's height above N. Distance along side wall (see picture) 5 m 8 m LA: Length of cable joining A and Q LB: Length of cable joining B and Q Le: Length of cable joining C and Q 16.9 m 8.1 m 14.2 m 1. Note: The floor is horizontal, the walls are vertical. Q/ No = 7û + 5ý + 8 w Result: LA = 202 168 cos(0) LB = Lc = V137 - cos(0) 62 Homework 1: Vectors - basis independent Copyright © 1992-2017 Paul Mitiguy. All rights reserved. 目回回
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Dimensional Analysis
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY