In a system with y = 2 and k = 2, a unit mass starts oscillating from the point 1 with initial selocity -2. At t= x/2 the damping coefficient y is changed so that the system undergoes critical damping. Identify the type of damping before t = 1/2. Establish the IVP for the model before and after t = x/2. What is the jump in the position, velocity and acceleration at t = 1/2?
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- A particle executes a simple harmonic motion of time period T. Find the time taken by the particle to go directly from its mean position to half the amplitude,Problem2: An automobile suspension system is critically damped, and its period of free oscillation with no damping is 1 s. If the system is initially displaced by an amount and released with zero initial velocity (at 1 = 0; x(0) =xq and v(0) = 0) a- Determine the value of the angular frequency of free oscillation with no damping. (w, = ??) b- Deduce the value of friction factor (g =??) c- Write the expression of position as a function of time of the system, if the system is critically damped. (x(1) = ??) d- Deduce the expression of the velocity of the system. (v(1) = ??) e- Use the initial conditions to find the displacement at t = 1 s. (x(1) = ??)A horizontal spring is attached to mass of 1 kg. The spring constant is 5. The coefficient offriction, f, is unknown. For what values of f will the system be under-damped (oscillatory)?
- Consider a spring mass system which is forced into motion by an external force of magnitude 4 cos(10t). If the oscillator is such that m-3, k-27 and damping is b-10. Then the system O a. will oscillate with increasing amplitude until it breaks O b. will oscillate with changing amplitude until it reaches a steady state regime and continue oscillating forever, with constant amplitude OC will oscillate with decreasing amplitude until it goes to rest. Od will go to rest without oscillatingConsider a spring mass fldamper syatem with the parameters m= 100 kg c= 20kg/s k= 1000 N/m It is known that a parge force of 500 N is applied to the damped system for 20 ms. What is the express of response of the systemProblem 2 (Estimating the Damping Constant). Recall that we can experimentally mea- sure a spring constant using Hooke's law-we measure the force F required to stretch the spring by a certain y from its natural length, and then we solve the equation F = ky for the spring constant k. Presumably we would have to determine the damping coefficient of a dashpot empirically as well, but how would we do so? As a warm-up, suppose we have a underdamped, unforced spring-mass system with mass 0.8 kg, spring constant 18 N/m, and damping coefficient 5 kg/s. We pull the mass 0.3 m from its rest position and let it go while imparting an initial velocity of 0.7 m/s. %3D (a) Set up and solve the initial value problem for this spring-mass system. (b) Write your answer from part (a) in phase-amplitude form, i.e. as y(t) = Aeºt sin(ßt – 4) and graph the result. Compare with a graph of your answer from (a) to check that you have the correct amplitude and phase shift. (c) Find the values of t at which y(t)…
- r.mathPlease explain why beta = 3omega is an example of a critically damping motion for a damped harmonic oscillator?you have a spring. you stick a ball with a mass of 3 killograms on it. you know the damping constant is 6. the spring with the mass on it can be extended 2.5 m beond its equlibrium length when a force of 5 newtons acts on it. assume that you stetch the spring to 5 meters beond its natural equilibrium length and then you realse it with zero velocity. in the notation of the text, what is the value c2-4mk? write your answer in the blank provided below: ______________________m2kg2/sec2
- Problem2: An automobile suspension system is critically damped, and its period of free oscillation with no damping is 1 s. If the system is initially displaced by an amount and released with zero initial velocity (at t= 0; x(0) =x, and v(0) = 0) Determine the value of the angular frequency of free oscillation with no damping. (wo a- = ??) b- Deduce the value of friction factor (g =??) c- Write the expression of position as a function of time of the system, if the system is critically damped. (x(t) = ??) d- Deduce the expression of the velocity of the system. (v(t) = ??) e- Use the initial conditions to find the displacement at t= 1 s. (x(t) = ??)The fixing element B receives a horizontal motion given by xB = bcos(wt). Derive the equation of motion for the mass and define the critical angular fre- quency we at which the oscillations of the mass become excessively large. What is the damping coefficient of the system? €1 wwwwww m €2 xg= b cos cot B