Premise Relative Position vector Let x denote the position of a point relative to the origin...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Premise Relative Position vector Let x denote the position of a point relative to the origin O of an underlying Cartesian coordinate system covering the familiar 3D Euclidean point space &. Letting Q be some point in with position xq, whether time dependent or not, we denote by r/o the position of a generic point x relative to Q, i.c., r/Q == x-xQ. Furthermore, given two points A and B, whether moving or not, we denote by F/B the position of A relative to B, so that we have TA/B=XA-XB and rA/B=1/B /A- We extend this notation to velocity and accelerations, so that V/A=/A_/A=V/A, VA/B=A/B,_A/B=A/B- c(B(t)) = p(1) B(t) Linear and Angular Momentum & Resultant Forces and Moments We consider a body in motion with current configuration B(t). The (Eulerian form of the) mass density distribution and the material velocity are p(x, t) and v(x, t), respectively. Then, the linear momentum of the body is denoted by L(B(t)) and is defined as pv dB(t). Aq(B(t)) = (x (1) (2) (x xq) pv dB(t). Choosing an arbitrary point Q with position xo(t) as a moment center, the angular momentum of the body relative to Q is denoted by Ao(B(t)) and is defined as the moment of the momentum relative to Q, that is, (3) Note that, using the notation introduced above, A(B(t)) can be written as Aq = B(0 (5) We assume that B(t) moves under the action of a surface traction distribution s(x, t) and an external body force field bo(x, t). Then, the resultant of the external forces acting on B(t) is denoted by F(B(t)) and is defined as T/QXp r/Q x pv dB(t). F(B(t)) = bodB(t) + (6) B(t) Using the notation introduced above, and choosing a point Q with position xo(t) as moment center, the resultant moment of all the external forces computed relative to Q is denoted by Mo (B(t)) and is defined as MQ(B(t)) = r/Q x bo dB(t) + B(t) -JAR xG(t) = = 1 B(0) B Aspin (t) = B(t) Center of Mass and Spin Angular Momentum The center of mass of B(t) is the point G whose position relative to the origin O is Love sd(@B(t)). r/qxsd(@B(t)). px dB(t). Given the above definition, one can show that the linear momentum of the body can be expressed as L(B(t)) = mvg(t) with vo(t) = xg(t), (9) (7) where and vg(t) is the velocity of G. We denote the spin angular momentum by Aspin (t) and we define it as the moment relative to G of the momentum relative to G,* i.e., (8) r/GX pv/G dB(t). (10) Problem 1 Show that, for any two arbitrary points Q and P, Aq = Ap+rP/Q X L. (1.1) Premise Relative Position vector Let x denote the position of a point relative to the origin O of an underlying Cartesian coordinate system covering the familiar 3D Euclidean point space &. Letting Q be some point in with position xq, whether time dependent or not, we denote by r/o the position of a generic point x relative to Q, i.c., r/Q == x-xQ. Furthermore, given two points A and B, whether moving or not, we denote by F/B the position of A relative to B, so that we have TA/B=XA-XB and rA/B=1/B /A- We extend this notation to velocity and accelerations, so that V/A=/A_/A=V/A, VA/B=A/B,_A/B=A/B- c(B(t)) = p(1) B(t) Linear and Angular Momentum & Resultant Forces and Moments We consider a body in motion with current configuration B(t). The (Eulerian form of the) mass density distribution and the material velocity are p(x, t) and v(x, t), respectively. Then, the linear momentum of the body is denoted by L(B(t)) and is defined as pv dB(t). Aq(B(t)) = (x (1) (2) (x xq) pv dB(t). Choosing an arbitrary point Q with position xo(t) as a moment center, the angular momentum of the body relative to Q is denoted by Ao(B(t)) and is defined as the moment of the momentum relative to Q, that is, (3) Note that, using the notation introduced above, A(B(t)) can be written as Aq = B(0 (5) We assume that B(t) moves under the action of a surface traction distribution s(x, t) and an external body force field bo(x, t). Then, the resultant of the external forces acting on B(t) is denoted by F(B(t)) and is defined as T/QXp r/Q x pv dB(t). F(B(t)) = bodB(t) + (6) B(t) Using the notation introduced above, and choosing a point Q with position xo(t) as moment center, the resultant moment of all the external forces computed relative to Q is denoted by Mo (B(t)) and is defined as MQ(B(t)) = r/Q x bo dB(t) + B(t) -JAR xG(t) = = 1 B(0) B Aspin (t) = B(t) Center of Mass and Spin Angular Momentum The center of mass of B(t) is the point G whose position relative to the origin O is Love sd(@B(t)). r/qxsd(@B(t)). px dB(t). Given the above definition, one can show that the linear momentum of the body can be expressed as L(B(t)) = mvg(t) with vo(t) = xg(t), (9) (7) where and vg(t) is the velocity of G. We denote the spin angular momentum by Aspin (t) and we define it as the moment relative to G of the momentum relative to G,* i.e., (8) r/GX pv/G dB(t). (10) Problem 1 Show that, for any two arbitrary points Q and P, Aq = Ap+rP/Q X L. (1.1)
Expert Answer:
Related Book For
Statistics The Exploration & Analysis Of Data
ISBN: 9780840058010
7th Edition
Authors: Roxy Peck, Jay L. Devore
Posted Date:
Students also viewed these mechanical engineering questions
-
The new line character is utilized solely as the last person in each message. On association with the server, a client can possibly (I) question the situation with a client by sending the client's...
-
Portray in words what transforms you would have to make to your execution to some degree (a) to accomplish this and remark on the benefits and detriments of this thought.You are approached to compose...
-
You believe that oil prices will be rising more than expected, and that rising prices will result in lower earnings for industrial companies that use a lot of petroleum-related products in their...
-
Suppose you want to develop a model that predicts the gas mileage of a car. The explanatory variables you are going to utilize are x1: city or highway driving x2: weight of the car x3: tire pressure...
-
Match the materials control form in the left column with the person responsible for its preparation in the right column. (A selection may be used more than once.) a. Purchase requisition 1....
-
Consider heat transfer over a flat plate again but now include an additional term due to viscous heating. Show that the similarity method is applicable to this problem as well, and derive the...
-
The town council of Riverside met in December 2011. The council estimated revenues for 2012 to be $750,000 from property taxes and $150,000 from business licenses. The appropriations budget from the...
-
Last year Minden Company introduced a new product and sold 2 5 , 1 0 0 units of it at a price of $ 9 9 per unit. The product's variable expenses are $ 6 9 per unit and its fixed expenses are $ 8 3 0...
-
Sound Sleeper Ltd. manufactures and sells mattresses to retailers across Canada. In 2020, Sound Sleeper signed a two-year contract with Zzz Ltd. to supply it with 40,000 mattresses at a price of $100...
-
The City of Hays currently pays $7,234,382 in debt service annually with annual revenues totally $67,989,973. If the Citys benchmark debt ratio is 15%, can the City issue more debt? Why? If so, how...
-
What are the molecular mechanisms underlying the process of DNA repair, and how do defects in these mechanisms contribute to diseases such as cancer?
-
Can you elaborate on the principles of molecular evolution, including the mechanisms of genetic variation, selection pressures, and speciation events?
-
Compute the net operating asset (NOA) turnover ratios for Tesla and Ford for 2014.
-
Research GE's current use of Non GAAP metrics (see supplemental articles) and comment on how helpful or hurtful it is, and is it justified?
-
Keith Frost, CPA, is feeling an extreme amount of pressure from his client, Shel Incorporated, to reduce audit fees substantially this year. What type of independence threat might this be?
-
A 1st order high-pass filter is dimensioned so that the buckling frequency is 2000 rad/s. R = 42 Perform a simulation in Simulink that shows the output signal Y when the input signal X is a square...
-
Which of the following statements is false? a. Capital leases are not commonly reported in a Capital Projects Fund. b. A governmental entity may report a Capital Project Fund in one year but not the...
-
A deficiency of the trace element selenium in the diet can negatively impact growth, immunity, muscle and neuromuscular function, and fertility. The introduction of selenium supplements to dairy cows...
-
Give as much information as you can about the P-value for an upper-tailed F test in each of the following situations. a. df1 = 4, df2 = 15, F = 5.37 b. df1 = 4, df2 = 15, F = 1.90 c. df1 = 4, df2 =...
-
An article in the New York Times (March 2, 1994) reported that people who suffer cardiac arrest in New York City have only a 1 in 100 chance of survival. Using probability notation, an equivalent...
-
Define a closely held corporation.
-
Explain the role played by a board of directors of a corporation.
-
Explain the steps in forming a limited liability corporation.
Study smarter with the SolutionInn App