Dynamics Definition and 1000 Threads

General Dynamics Corporation (GD) is an American publicly traded, aerospace and defense corporation headquartered in Reston, Virginia. As of 2020, it was the third-largest defense contractor in the United States, and the third-largest in the world, by sales. The company is a Fortune 100 company, and was ranked No. 83 in 2020.Formed in 1954 with the merger of submarine manufacturer Electric Boat and aircraft manufacturer Canadair, the corporation today consists of ten subsidiary companies with operations in 45 countries. The company’s products include Gulfstream business jets, Virginia- and Columbia-class nuclear-powered submarines, Arleigh Burke-class guided-missile destroyers, M1 Abrams tanks and Stryker armored fighting vehicles.
In 2020, General Dynamics had worldwide sales of $37.9 billion and a workforce of more than 100,000 full-time employees. The current chairman and chief executive officer (CEO) is Phebe Novakovic.

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  1. J

    Population Dynamics how to solve a particular ODE

    Homework Statement I have a population problem where: \frac{dy}{dt} = ay - by^{2}-\frac{c*y^{3}}{d+y^{3}} I need to find an expression for y(t). I'm not looking for the answer, just some advice/ helpful hints. Thank you. Homework Equations The Attempt at a Solution I...
  2. M

    Dynamics help: variable acceleration and angular velocity

    I have to do these 2 problems for homework, but I can't figure them out. Any help would be appreciated. 1. The motorcycle is traveling at 1m/s when it is at A(the origin). If the speed is then increased at \dot{V} = .1 m/s^2, determine its speed and acceleration at the instant t = 5 seconds...
  3. C

    How Do You Calculate the Final Speed of a Rocket Car on an Inclined Ramp?

    Homework Statement A 1200 kg rocket car is placed at the bottom of a 100 meter long ramp inclined at 10°. The rocket is turned on and it exerts a force of 8300 N for 5.70 seconds, and then it shuts down. Find the speed with which the rocket car leaves the ramp (assume frictionless)...
  4. K

    Physiology Cardiovascular Dynamics

    Need help with this question: Would parasympathetic stimulation of the heart affect the Starling relationship between end diastolic volume (EDV) and stroke volume (SV)? In other words, what would be expected to happen to the Starling Curve if you increased or decreased parasympathetic...
  5. A

    Dynamics - Normal and Tangential Motion

    Homework Statement The tires on a car are capable of exerting a maximum frictional force of 1753 lb. If the car is traveling at 75 ft.s and the curvature of the road is ρ=560 ft, what is the maximum acceleration that the car can have without sliding? Homework Equations ƩFn = man The...
  6. D

    Question about fluid dynamics (calculating concentration)

    Hi all, I have a question about calculating the concentration of continuous air and carbon monoxide flowing through a pipe. If the gas cylinder originally has 20% CO and 80% air and it will be diluted by another gas cylinder of air, how do you account for temperature, pressure, and...
  7. Z

    Understanding the Pendulum Dynamics Equation for a Cart

    Didn't get this equation which is written for the pendulum part of the cart. Must be easy but couldn't get it.
  8. micromass

    Classical Classical Dynamics: A Contemporary Approach by José and Saletan

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  9. N

    Deriving Moment of Inetia using just linear dynamics

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  10. N

    Good beginner math book on fractional dynamics

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  11. Astronuc

    Computational Fluid Dynamics by John D. Anderson

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  12. G

    Maths behind non-linear dynamics, driven damped oscillator more specifically.

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  13. A

    What Is the Maximum Constant Speed of a Motorcyclist on a Curved Path?

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  14. B

    Basic Fluid Dynamics: Calculating Exit Velocity & Mass Flow Rate

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  15. Astronuc

    Engineering Mechanics: Statics & Dynamics by Russell Hibbeler

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  16. G

    MATLAB Is fortran 90 or matlab better for simulating non-linear dynamics (Chaos)?

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  17. S

    Fluid Dynamics - increasing pressure

    I am working on hobby project with almost no budget. I bought some "nice" (cheap & simple) electronic solenoid valves for water flow. I've since discovered that they need 3PSI to open. Which is ok for the supply lines. But the drain line requires that as well. Now I either need a column of water...
  18. M

    Two Rotational Dynamics Problem

    1) 10. Four objects are placed at rest at the top of an inclined plane and allowed to roll without slipping to the bottom in the absence of rolling resistance and air resistance. • Object A is a solid brass ball of diameter d. • Object B is a solid brass ball of diameter 2d. • Object C is a...
  19. Greg Bernhardt

    Classical What Topics Are Covered in Classical Dynamics of Particles and Systems?

    Author: Stephen T. Thornton (Author), Jerry B. Marion (Author) Title: Classical Dynamics of Particles and Systems Amazon Link: https://www.amazon.com/dp/0534408966/?tag=pfamazon01-20 Prerequisities: Calculus, Ordinary and Partial Differential Equations, Introductory Physics Level...
  20. B

    Integration help, Kepler's problem Lagrangian dynamics

    Homework Statement Carry out the integration ψ = ∫[M(dr/r2)] / √(2m(E-U(r)) - (M2/r2)) E = energy, U = potential, M = angular momentum using the substitution: u = 1/r for U = -α/r Homework Equations The Attempt at a Solution This is as far as I've gotten: -∫ (Mdu) /...
  21. Saitama

    Rotational dynamics, semicircular arc

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  22. Z

    Dynamics of circular motion. Particle on the top of a circle

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  23. G

    Solve Rotational Dynamics Homework: Hollow Cylinder, Weight, String

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  24. L

    Dynamics - the physics of tobogganing and forces at an angle

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  25. J

    Lagrangian Dynamics - Grandfather Clock?

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  26. J

    Finding a Dynamics Book with Derivation for Angular Acceleration

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  27. C

    Dynamics- Angular Impulse and Momentum Problem

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  28. J

    Modeling Wave Dynamics in a Cylinder on a Fulcrum

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  29. P

    Dynamics- effect caused be angle, friction

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  30. P

    An odd question on orbital dynamics

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  31. T

    Rotational Dynamics Problem - Rod slipping against Block

    Homework Statement A uniform rod of mass m and length l is pivoted at point O. The rod is initially in vertical position and touching a block of mass M which is at rest on a horizontal surface. The rod is given a slight jerk and it starts rotating about point O. This causes the block to...
  32. D

    MHB Investigating Inconsistencies in Strogatz's Nonlinear Dynamics Book

    Strogatz's Nonlinear and Dynamics book states that $$ \langle\sin^{2n}\rangle = \frac{1\cdot 3\cdot 5\cdots (2n-1)}{2\cdot 4\cdot 6\cdots 2n} $$ for $n\geq 1$. However, $\langle\sin^6\rangle = \frac{5}{16}\neq\frac{15}{48}$. What is the deal here?
  33. E

    Gas Dynamics (Compressible Flow) Normal Shock Wave

    Homework Statement Suppose that a blast wave, which might have been initiated by an atomic bomb explosion, is traveling through air at standard atmospheric conditions with a speed of 60,000 m/s find change in ( pressure , temperature , stagnation pressure , velocity ) produced by the wave...
  34. E

    Difference between Intermediate Dynamics / Mechanics?

    So there's this new course at my school called "Intermediate Dynamics" and I'm wondering if there are any differences between this course and another called "Intermediate Mechanics." Dynamics is in the MAE department and Mechanics in the Physics department. Here are the descriptions...
  35. G

    2D Dynamics Work-Energy Problem

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  36. L

    How Fast Can Water Flow from a Kitchen Faucet on the Third Floor?

    Homework Statement water in main pipe at the street level is at a gauge pressure of 170 KPa and is moving with neglibible speed. A pipe connected to the main pipe is used to deliver the water to kitchen located on the third floor of a building, at a 15-m height from the street level. what is...
  37. X

    3d dynamics rotation/inertial formula question

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  38. D

    Rotational Dynamics Confusion

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  39. X

    Are All One-Dimensional Vector Fields Gradient Systems?

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  40. T

    Finding the Axis of Rotation in a Rotational Dynamics Problem

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  41. X

    Understanding 3D Rigid Body Dynamics Equations: R=R'Ω Explained

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  42. U

    Circular Motion Dynamics. Car traveling in vertical circle

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  43. B

    Wheel dynamics: sliding and skidding

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  44. S

    Rotational Dynamics - Energy, Torque

    Hi, I'm new to the forum, starting off with some rotational stuff that I am not grasping well... I have diagrams for each question too, which i feel are vital to understanding the questions Homework Statement A spherical ball bearing 0.025m in diameter, rolls without slipping down an...
  45. D

    Someone explain hybrid zero dynamics in simple english?

    Homework Statement I'm working on a bipedal walker and as part of initial research I found hybrid zero dynamics as a solution to help detect terrain. The current method used is combining data from accelerometer and gyroscope and using Kalman Filter to find angle in x,y,z planes...
  46. G

    TTU Dynamics - Energy Analysis in American Units

    I am having a problem with dynamics this semester. Our professor gives us "FE-like" questions, which are actually more complicated than FE questions. I can get to where I need to apply the kinetic energy equation but my units look really large and I don't know what to do with W' or how I can get...
  47. B

    Stuck on derivation of Euler's equations in rigid body dynamics

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  48. J

    Pulling a plank across cylinders - Rotational Dynamics

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  49. B

    Struggling with Rotational Dynamics Homework?

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  50. G

    Engineeing Dynamics - Inertia Dyad of Half Cylinder

    I'm getting desperate. The professor has assigned a project and has not clearly explained how to derive the answers. I'm doing the best I can but his TA's and recommended tutors for the class are always incapable of reproducing the answers either. It's a junior level dynamics class, but he's...
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