What is Engineering dynamics: Definition and 21 Discussions

Mechanical engineering is an engineering branch that combines engineering physics and mathematics principles with materials science to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the engineering branches.Mechanical engineering combines creativity, knowledge and analytical tools to complete the difficult task of shaping an idea into reality.
The mechanical engineering field requires an understanding of core areas including mechanics, dynamics, thermodynamics, materials science, structural analysis, and electricity. In addition to these core principles, mechanical engineers use tools such as computer-aided design (CAD), computer-aided manufacturing (CAM), and product lifecycle management to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics, medical devices, weapons, and others. It is the branch of engineering that involves the design, production, and operation of machinery.Mechanical engineering emerged as a field during the Industrial Revolution in Europe in the 18th century; however, its development can be traced back several thousand years around the world. In the 19th century, developments in physics led to the development of mechanical engineering science. The field has continually evolved to incorporate advancements; today mechanical engineers are pursuing developments in such areas as composites, mechatronics, and nanotechnology. It also overlaps with aerospace engineering, metallurgical engineering, civil engineering, electrical engineering, manufacturing engineering, chemical engineering, industrial engineering, and other engineering disciplines to varying amounts. Mechanical engineers may also work in the field of biomedical engineering, specifically with biomechanics, transport phenomena, biomechatronics, bionanotechnology, and modelling of biological systems.

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  1. Shankar Das

    Practicing Mechanical Engineering Dynamics Problems

    Hello, I hope you all are doing fine and healthy. For my mechanical engineering dynamics I want to practice related problems taught in my class, here is a preview of some problems. Can anyone tell me from which book or solution manual are these problems from? I want to practice as much problems...
  2. O

    Dynamics Problem: Determine Velocity and Acceleration of Rigid body

    Hello, Wanted to know if this was the correct approach to solve this example. I uploaded the question along with an attempt. Thanks in advance.
  3. ramzerimar

    Dynamics problem: determine maximum angle for equilibrium

    Homework Statement A uniform bar with length c can slide a cylindrical surface with a radius of r. Determine the maximum angle theta that guarantees the equilibrium of the bar if the friction coefficient at the points of contact is u. Homework Equations Friction force = u*N (where N is the...
  4. A

    Curvilinear Motion: Polar Coordinates (Engineering Dynamics)

    Homework Statement Homework EquationsThe Attempt at a Solution I have stared at this for hours and don't know where to start. I think I need to get r in terms of t but I don't really know how with the information given. I just need a good hint to get started.
  5. J

    Engineering Dynamics: Solving Train Decel on Slope

    Homework Statement The 160-Mg train travels with a speed of 80 kmlh when it starts to climb the slope. If the engine exerts a traction force F of 1120 of the weight of the train and the rolling resistance F D is equal to 1/500 of the weight of the train, determine the deceleration of the train...
  6. M

    Engineering Dynamics: Find gun initial recuperator force to limit recoil

    1)The breech and barrel of a field gun have a total mass of 453.6kg. The recoil of the barrel is controlled by resistance forces from a buffer and recuperator, these forces are given by: Buffer force=71000/(s+1), recuperator force= P+ 4380s. (both are in Newtons). s is the recoil of the barrel...
  7. V

    Engineering Dynamics: Connected Systems

    Homework Statement A uniform bar ABCD having a mass of 4.25kg is pivoted at B shown in Figure below. The bar ABCD is supported at A and D by springs having stiffness’s of 12kN/m and 2kN/m respectively. A torsional spring of stiffness 100Nm/rad is also present at the pivot B and a damper is...
  8. C

    Engineering Dynamics - Velocity and Acceleration Analysis

    Homework Statement Here is a picture of the problem! http://imgur.com/suJxZ0F Also here it is in text, Rod AB rotates with the angular velocity and acceleration clockwise as shown. Points A,B and C are pin connected. Point C is free to slide horizontally as shown in the figure at the instant...
  9. C

    Engineering Dynamics - Conservation of Energy

    Homework Statement Two spheres are hanging from cords as shown. The distance from the ceiling to the center of each sphere is 2m, and the coefficient of restitution is 0.75. If sphere "A" (m_a = 2kg) is drawn back 60^o and released from rest, determine: a) The maximum angle, θ_B , that sphere...
  10. R

    Engineering Dynamics Problem

    1. Problem statement: A 5000-lb truck is being used to lift a 1000-lb boulder B that is on a 200-lb pallet. Knowing the acceleration of the truck is 1 ft/s^2, determine the horizontal force between the tires and ground. The truck is on a horizontal plane with the boulder and pallet...
  11. C

    Engineering Dynamics - Car Striking a Barrier

    Homework Statement A car, assumed to be rigid and having a mass of 800 kg, strikes a barrel-barrier installation without the driver applying the brakes. From experiments the magnitude of the force of resistance F_r, created by deforming the barrels successive, is shown as a function of the...
  12. B

    Engineering Dynamics, weight is missing, simple problem

    Homework Statement It is given in the photo Homework Equations They are all given in the photo The Attempt at a SolutionI solved exactly the same as in the solution manual, except for the FBD of the slider B, when they write the 2nd Law, they do not input the weight there, only the...
  13. T

    Mechanical Engineering Dynamics Problem

    Homework Statement A plastic film moves over two drums. During a 4s interval the speed of the tape is increased uniformly from v0= 2ft/s to v1= 4ft/s. Knowing that the tape does not slip on the drums, determine (a) the angular acceleration of drum B, (b) the number of revolutions executed by...
  14. S

    Analyzing Dynamic Orbits: Tension, Speed, and Angular Momentum Calculations

    Homework Statement A ball of 10kg mass is suspended by a cable that passes through a hole in a floor. The ball rotates in a circular orbit, A, that is in a plane that is 3m below the floor. If the orbit has a radius of 1m, calculate; a) Tension in the cable b) speed va of the ball in...
  15. B

    Engineering Dynamics: Normal-Tangential Components

    Homework Statement A race boat is traveling at a constant speed v0 = 130 mph when it performs a turn with constant radius ρ to change its course by 90°. The turn is performed while losing speed uniformly in time so that the boat's speed at the end of the turn is vf = 116 mph. If the magnitude...
  16. P

    How to Minimize Vertical Vibrations in a Machine with a Vibration Absorber?

    Vibration - Equation of motion Q A machine having a mass of 1500 kg is mounted on supports which provide an effective vertical stiffness of 4.5 MN/m. The machine is subjected to a vertical harmonic force having an amplitude of 200 N at a frequency equivalent to 80% of the natural frequency of...
  17. E

    Engineering Dynamics (Motion related)

    Homework Statement The rocket sled starts from rest and accelerates at a = 30 + 2t until its velocity is 400m/s. It then hits a water brake and its acceleration is a = -0.003v^2 m/s^2 until its velocity decreases to 100 m/s. What total distance does it travel? Homework Equations v = u...
  18. M

    Good engineering dynamics book?

    hey, does anyone have a recommendation of a good dynamics book? the dynamics class I'm taking this semester doesn't have a specific book. I've been through too many books and i just wanted to get some input on a good, easy to teach yourself book. this is an online dynamics class by the...
  19. V

    Pulley Problem for Engineering Dynamics Course

    The cable at C is being pulled down at a velocity of 4 \frac{ft}{s}. The cable at C is also decelerating at a rate of 2 \frac{ft}{s^2}. At what velocity and acceleration is the block at A moving? http://img222.imageshack.us/img222/729/engr204problem121795wl.jpg I have the following...
  20. W

    Meriam Engineering Dynamics 5th ed.

    If anyone could help me with some problems from this book that would be great. The problems are a bit much to describe, so if anyone knows this text and can help, let me know, and then I can describe what particular problems I am having trouble with and why. Thanks