Engineering Mechanics: Dynamics
8th Edition
ISBN: 9781118885840
Author: James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher: WILEY
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Chapter 2.9, Problem 214P
To determine
The velocity of
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Problem 2 (55 pts). We now consider the FEM solution of Problem 1.(a) [5pts] Briefly describe the 4 steps necessary to obtain the approximate solution of thatBVP using the Galerkin FEM. Use the minimum amount of math necessary to supportyour explanations.(b) [20pts] Derive the weak form of the BVP.(c) [10pts] Assuming a mesh of two equal elements and linear shape functions, sketch byhand how you expect the FEM solution to look like. Also sketch the analytical solutionfor comparison. In your sketch, identify the nodal degrees of freedom that the FEMsolution seeks to find.(d) [10pts] By analogy with the elastic rod problem and heat conduction problem considered in class, write down the stiffness matrix and force vector for each of the twoelements considered in (c).(e) [10pts] Assemble the global system of equations, and verbally explain how to solve it.
An aluminum rod of length L = 1m has mass density ρ = 2700 kgm3 andYoung’s modulus E = 70GPa. The rod is fixed at both ends. The exactnatural eigenfrequencies of the rod are ωexactn =πnLqEρfor n=1,2,3,. . . .1. What is the minimum number of linear elements necessary todetermine the fundamental frequency ω1 of the system? Discretizethe rod in that many elements of equal length, assemble the globalsystem of equations KU = ω2MU, and find the fundamentalfrequency ω1. Compute the relative error e1 = (ω1 − ωexact1)/ωexact1.Sketch the fundamental mode of vibration.
Chapter 2 Solutions
Engineering Mechanics: Dynamics
Ch. 2.2 - Prob. 1PCh. 2.2 - Problems 2/1 through 2/8 treat the motion of a...Ch. 2.2 - Problems 2/1 through 2/8 treat the motion of a...Ch. 2.2 - Problems 2/1 through 2/8 treat the motion of a...Ch. 2.2 - Problems 2/1 through 2/8 treat the motion of a...Ch. 2.2 - Problems 2/1 through 2/8 treat the motion of a...Ch. 2.2 - Problems 2/1 through 2/8 treat the motion of a...Ch. 2.2 - Problems 2/1 through 2/8 treat the motion of a...Ch. 2.2 - Prob. 9PCh. 2.2 - A particle in an experimental apparatus has a...
Ch. 2.2 - Ball 1 is launched with an initial vertical...Ch. 2.2 - Experimental data for the motion of a particle...Ch. 2.2 - In the pinewood-derby event shown, the car is...Ch. 2.2 - A ball is thrown vertically up with a velocity of...Ch. 2.2 - A car comes to a complete stop from an initial...Ch. 2.2 - The pilot of a jet transport brings the engines to...Ch. 2.2 - A game requires that two children each throw a...Ch. 2.2 - Prob. 18PCh. 2.2 - In the final stages of a moon landing, the lunar...Ch. 2.2 - A girl rolls a ball up an incline and allows it to...Ch. 2.2 - At a football tryout, a player runs a 40-yard dash...Ch. 2.2 - The main elevator A of the CN Tower in Toronto...Ch. 2.2 - A Scotch-yoke mechanism is used to convert rotary...Ch. 2.2 - A train which is traveling at 80 mi/hr applies its...Ch. 2.2 - Small steel balls fall from rest through the...Ch. 2.2 - Car A is traveling at a constant speed vA = 130...Ch. 2.2 - Prob. 27PCh. 2.2 - A particle moving along a straight line has an...Ch. 2.2 - Prob. 29PCh. 2.2 - An electric car is subjected to acceleration tests...Ch. 2.2 - A vacuum-propelled capsule for a high-speed tube...Ch. 2.2 - If the velocity v of a particle moving along a...Ch. 2.2 - The 230,000-lb space-shuttle orbiter touches down...Ch. 2.2 - Prob. 35PCh. 2.2 - The cart impacts the safety barrier with speed v0...Ch. 2.2 - Prob. 37PCh. 2.2 - Prob. 38PCh. 2.2 - Prob. 39PCh. 2.2 - Prob. 41PCh. 2.2 - A projectile is fired downward with initial speed...Ch. 2.2 - The aerodynamic resistance to motion of a car is...Ch. 2.2 - Prob. 44PCh. 2.2 - Prob. 45PCh. 2.2 - Prob. 46PCh. 2.2 - The stories of a tall building are uniformly 10...Ch. 2.2 - Prob. 48PCh. 2.2 - Prob. 49PCh. 2.2 - Prob. 50PCh. 2.2 - Prob. 51PCh. 2.2 - Car A travels at a constant speed of 65 mi/hr....Ch. 2.2 - Prob. 53PCh. 2.2 - Prob. 54PCh. 2.2 - Prob. 55PCh. 2.2 - Prob. 56PCh. 2.2 - Prob. 57PCh. 2.2 - Repeat Prob. 2/57 for the case where aerodynamic...Ch. 2.4 - At time t = 10 s, the velocity of a particle...Ch. 2.4 - Prob. 60PCh. 2.4 - At time t = 0, a particle is at rest in the x-y...Ch. 2.4 - The rectangular coordinates of a particle which...Ch. 2.4 - For a certain interval of motion the pin A is...Ch. 2.4 - With what minimum horizontal velocity u can a boy...Ch. 2.4 - Prove the well-known result that, for a given...Ch. 2.4 - A placekicker is attempting to make a 64-yard...Ch. 2.4 - Prob. 67PCh. 2.4 - Prob. 68PCh. 2.4 - If a strong wind induces a constant rightward...Ch. 2.4 - Prob. 70PCh. 2.4 - Prob. 71PCh. 2.4 - A boy tosses a ball onto the roof of a house. For...Ch. 2.4 - A small airplane flying horizontally with a speed...Ch. 2.4 - As part of a circus performance, a man is...Ch. 2.4 - Prob. 75PCh. 2.4 - Prob. 76PCh. 2.4 - Prob. 77PCh. 2.4 - Prob. 78PCh. 2.4 - If the tennis player serves the ball horizontally...Ch. 2.4 - A golfer is attempting to reach the elevated green...Ch. 2.4 - Prob. 81PCh. 2.4 - Prob. 82PCh. 2.4 - A ski jumper has the takeoff conditions shown....Ch. 2.4 - Prob. 84PCh. 2.4 - Prob. 85PCh. 2.4 - Prob. 86PCh. 2.4 - A projectile is launched from point A with the...Ch. 2.4 - A team of engineering students is designing a...Ch. 2.4 - Prob. 89PCh. 2.4 - Determine the location h of the spot toward which...Ch. 2.4 - A projectile is launched from point A with υ0 = 30...Ch. 2.4 - A projectile is fired with a velocity u at right...Ch. 2.4 - A projectile is launched from point A with an...Ch. 2.4 - A projectile is launched from point A and lands on...Ch. 2.4 - A projectile is launched with speed υ0 from point...Ch. 2.4 - A projectile is ejected into an experimental fluid...Ch. 2.5 - A test car starts from rest on a horizontal...Ch. 2.5 - If the compact disc is spinning at a constant...Ch. 2.5 - Prob. 99PCh. 2.5 - Determine the maximum speed for each car if the...Ch. 2.5 - An accelerometer C is mounted to the side of the...Ch. 2.5 - The driver of the truck has an acceleration of...Ch. 2.5 - A particle moves along the curved path shown. The...Ch. 2.5 - Prob. 104PCh. 2.5 - A sprinter practicing for the 200-m dash...Ch. 2.5 - A train enters a curved horizontal section of...Ch. 2.5 - Prob. 107PCh. 2.5 - Prob. 108PCh. 2.5 - An overhead view of part of a pinball game is...Ch. 2.5 - Prob. 110PCh. 2.5 - The speed of a car increases uniformly with time...Ch. 2.5 - A minivan starts from rest on the road whose...Ch. 2.5 - Consider the polar axis of the earth to be fixed...Ch. 2.5 - Prob. 114PCh. 2.5 - Prob. 115PCh. 2.5 - Prob. 116PCh. 2.5 - Prob. 117PCh. 2.5 - The preliminary design for a “small” space station...Ch. 2.5 - Prob. 119PCh. 2.5 - Prob. 120PCh. 2.5 - The figure shows a portion of a plate cam used in...Ch. 2.5 - Prob. 122PCh. 2.5 - During a short interval the slotted guides are...Ch. 2.5 - The particle P starts from rest at point A at time...Ch. 2.5 - Prob. 125PCh. 2.5 - Prob. 126PCh. 2.5 - In the design of a control mechanism, the vertical...Ch. 2.5 - In a handling test, a car is driven through the...Ch. 2.5 - A particle which moves with curvilinear motion has...Ch. 2.5 - A projectile is launched at time t = 0 with the...Ch. 2.6 - A car P travels along a straight road with a...Ch. 2.6 - The sprinter begins from rest at position A and...Ch. 2.6 - A drone flies over an observer O with constant...Ch. 2.6 - Motion of the sliding block P in the rotating...Ch. 2.6 - Rotation of bar OA is controlled by the lead screw...Ch. 2.6 - Prob. 136PCh. 2.6 - The boom OAB pivots about point O, while section...Ch. 2.6 - Prob. 138PCh. 2.6 - Consider the portion of an excavator shown. At the...Ch. 2.6 - Prob. 140PCh. 2.6 - Prob. 141PCh. 2.6 - A helicopter starts from rest at point A and...Ch. 2.6 - Prob. 143PCh. 2.6 - Prob. 144PCh. 2.6 - A fireworks shell P is launched upward from point...Ch. 2.6 - Prob. 146PCh. 2.6 - The rocket is fired vertically and tracked by the...Ch. 2.6 - Prob. 148PCh. 2.6 - Prob. 149PCh. 2.6 - Instruments located at O are part of the ground...Ch. 2.6 - Prob. 152PCh. 2.6 - At the bottom of a loop in the vertical (r-θ)...Ch. 2.6 - The member OA of the industrial robot telescopes...Ch. 2.6 - Prob. 155PCh. 2.6 - Prob. 156PCh. 2.6 - Prob. 157PCh. 2.6 - Prob. 158PCh. 2.6 - An earth satellite traveling in the elliptical...Ch. 2.6 - A meteor P is tracked by a radar observatory on...Ch. 2.6 - Prob. 161PCh. 2.6 - At time t = 0, the baseball player releases a ball...Ch. 2.6 - The racing airplane is beginning an inside loop in...Ch. 2.6 - A golf ball is driven with the initial conditions...Ch. 2.7 - The rectangular coordinates of a particle are...Ch. 2.7 - A projectile is launched from point O with an...Ch. 2.7 - Prob. 167PCh. 2.7 - Prob. 168PCh. 2.7 - Prob. 169PCh. 2.7 - The radar antenna at P tracks the jet aircraft A,...Ch. 2.7 - The rotating element in a mixing chamber is given...Ch. 2.7 - Prob. 172PCh. 2.7 - For the helicopter of Prob. 2/172, find the values...Ch. 2.7 - Prob. 174PCh. 2.7 - An industrial robot is being used to position a...Ch. 2.7 - Prob. 176PCh. 2.7 - Initial calculate the velocity of the spherical...Ch. 2.7 - Prob. 178PCh. 2.7 - Prob. 179PCh. 2.7 - Prob. 180PCh. 2.7 - Prob. 181PCh. 2.7 - The disk A rotates about the vertical z-axis with...Ch. 2.8 - Rapid-transit trains A and B travel on parallel...Ch. 2.8 - Prob. 184PCh. 2.8 - Prob. 185PCh. 2.8 - A helicopter approaches a rescue scene. A victim P...Ch. 2.8 - Prob. 187PCh. 2.8 - Train A travels with a constant speed vA = 120...Ch. 2.8 - The car A has a forward speed of 18 km/h and is...Ch. 2.8 - For the instant represented, car A has an...Ch. 2.8 - A drop of water falls with no initial speed from...Ch. 2.8 - Plano A travels along the indicated path with a...Ch. 2.8 - For the planes of Prob. 2/192, beginning at the...Ch. 2.8 - Prob. 194PCh. 2.8 - At the instant illustrated, car B has a speed of...Ch. 2.8 - Car A is traveling at 25 mi/hr and applies the...Ch. 2.8 - As part of an unmanned-autonomous-vehicle (UAV)...Ch. 2.8 - Prob. 199PCh. 2.8 - Prob. 200PCh. 2.8 - Prob. 201PCh. 2.8 - Prob. 202PCh. 2.8 - Prob. 203PCh. 2.8 - Prob. 204PCh. 2.8 - The aircraft A with radar detection equipment is...Ch. 2.8 - Prob. 206PCh. 2.9 - If the velocity of block A up the incline is...Ch. 2.9 - Prob. 208PCh. 2.9 - At a certain instant, the velocity of cylinder B...Ch. 2.9 - Determine the velocity of cart A if cylinder B has...Ch. 2.9 - An electric motor M is used to reel in cable and...Ch. 2.9 - Determine the relation which governs the...Ch. 2.9 - Determine an expression for the velocity vA of the...Ch. 2.9 - Neglect the diameters of the small pulleys and...Ch. 2.9 - Under the action of force P, the constant...Ch. 2.9 - Prob. 216PCh. 2.9 - Prob. 217PCh. 2.9 - Prob. 218PCh. 2.9 - Prob. 219PCh. 2.9 - Prob. 220PCh. 2.9 - Determine the vertical rise h of the load W during...Ch. 2.9 - Prob. 222PCh. 2.9 - Prob. 223PCh. 2.9 - Prob. 224PCh. 2.9 - Prob. 225PCh. 2.9 - Prob. 226PCh. 2.9 - The two sliders are connected by the light rigid...Ch. 2.9 - Prob. 228PCh. 2.10 - Prob. 229RPCh. 2.10 - Prob. 230RPCh. 2.10 - Prob. 231RPCh. 2.10 - Prob. 232RPCh. 2.10 - Prob. 233RPCh. 2.10 - Two airplanes are performing at an air show. Plane...Ch. 2.10 - Prob. 235RPCh. 2.10 - A bicyclist rides along the hard-packed sand beach...Ch. 2.10 - Prob. 237RPCh. 2.10 - Prob. 238RPCh. 2.10 - Prob. 239RPCh. 2.10 - Prob. 240RPCh. 2.10 - Prob. 241RPCh. 2.10 - Prob. 242RPCh. 2.10 - Prob. 243RPCh. 2.10 - Prob. 244RPCh. 2.10 - Prob. 245RPCh. 2.10 - Prob. 246RPCh. 2.10 - Prob. 247RPCh. 2.10 - If all frictional effects are neglected, the...Ch. 2.10 - Prob. 250RPCh. 2.10 - Prob. 251RPCh. 2.10 - A projectile is launched from point A with speed...Ch. 2.10 - Prob. 254RPCh. 2.10 - Prob. 256RP
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- Problem 1 (65 pts, suggested time 50 mins). An elastic string of constant line tension1T is pinned at x = 0 and x = L. A constant distributed vertical force per unit length p(with units N/m) is applied to the string. Under this force, the string deflects by an amountv(x) from its undeformed (horizontal) state, as shown in the figure below.The PDE describing mechanical equilibrium for the string isddx Tdvdx− p = 0 . (1)(a) [5pts] Identify the BCs for the string and identify their type (essential/natural). Writedown the strong-form BVP for the string, including PDE and BCs.(b) [10pts] Find the analytical solution of the BVP in (a). Compute the exact deflectionof the midpoint v(L/2).(c) [15pts] Derive the weak-form BVP.(d) [5pts] What is the minimum number of linear elements necessary to compute the deflection of the midpoint?(e) [15pts] Write down the element stiffness matrix and the element force vector for eachelement.arrow_forwardProblem 1 (35 pts). An elastic string of constant line tension1 T is pinned at x = 0 andx = L. A constant distributed vertical force per unit length p (with units N/m) is appliedto the string. Under this force, the string deflects by an amount v(x) from its undeformed(horizontal) state, as shown in the figure below.Force equilibrium in the string requires thatdfdx − p = 0 , (1)where f(x) is the internal vertical force in the string, which is given byf = Tdvdx . (2)(a) [10pts] Write down the BVP (strong form) that the string deflection v(x) must satisfy.(b) [2pts] What order is the governing PDE in the BVP of (a)?(c) [3pts] Identify the type (essential/natural) of each boundary condition in (a).(d) [20pts] Find the analytical solution of the BVP in (a).arrow_forwardProblem 2 (25 pts, (suggested time 15 mins). An elastic string of line tension T andmass per unit length µ is pinned at x = 0 and x = L. The string is free to vibrate, and itsfirst vibration mode is shown below.In order to find the frequency of the first mode (or fundamental frequency), the string isdiscretized into a certain number of linear elements. The stiffness and mass matrices of thei-th element are, respectivelyESMi =TLi1 −1−1 1 EMMi =Liµ62 11 2 . (2)(a) [5pts] What is the minimum number of linear elements necessary to compute the fundamental frequency of the vibrating string?(b) [20pts] Assemble the global eigenvalue problem and find the fundamental frequency ofvibration of the stringarrow_forward
- I need part all parts please in detail (including f)arrow_forwardProblem 3 (10 pts, suggested time 5 mins). In class we considered the mutiphysics problem of thermal stresses in a rod. When using linear shape functions, we found that the stress in the rod is affected by unphysical oscillations like in the following plot E*(ux-a*T) 35000 30000 25000 20000 15000 10000 5000 -5000 -10000 0 Line Graph: E*(ux-a*T) MULT 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Arc length (a) [10pts] What is the origin of this issue and how can we fix it?arrow_forwardanswer the questions and explain all of it in words. Ignore where it says screencast and in class explanationarrow_forward
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