Solving a Damped Movement w/ Mass Spring System: Find K, Acceleration

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In summary, the conversation discusses a mass spring system at rest and an external element that causes it to oscillate in a damped movement. The exercise involves determining the damping coefficient and acceleration of the body after 3.3 seconds. The relevant equations for damped harmonic motion are x = Ae^(-(b/2m)t) cos(ω't) and the equation for the damping coefficient is b = 2√(mk), where k is the spring constant and m is the mass.
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alnpoke
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New poster has been reminded to show the Relevant Equations and their work on the solution
Homework Statement
damping coeficient
Relevant Equations
x=Ae^(-(b/2m)t) cos⁡〖ω^' 〗 t⁡
hello everyone could you help me with this exercise please muffled movement

The mass spring system shown is at rest, to which an external element tensions it 1.9 (cm) (positive section of our study) and releases it, it begins to oscillate describing a damped movement. Considering that k = 180 (lb / ft), and that the mass has a value of 2.9 (kg), determine the damping coefficient if the ratio of variation between natural and damped oscillation is 7% and find the acceleration of the body after 3.3 (s) after starting the movement

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alnpoke said:
Homework Statement:: damping coeficient
Relevant Equations:: x=Ae^(-(b/2m)t) cos⁡〖ω^' 〗 t⁡

hello everyone could you help me with this exercise please muffled movement

The mass spring system shown is at rest, to which an external element tensions it 1.9 (cm) (positive section of our study) and releases it, it begins to oscillate describing a damped movement. Considering that k = 180 (lb / ft), and that the mass has a value of 2.9 (kg), determine the damping coefficient if the ratio of variation between natural and damped oscillation is 7% and find the acceleration of the body after 3.3 (s) after starting the movement

View attachment 264544View attachment 264545
Per forum rules you must show an attempt. You should also be able to state some standard equation for damped harmonic motion.
 

1. How do you determine the value of K in a damped mass spring system?

The value of K can be determined by using the formula K = (2πf)^2m, where f is the frequency of the system and m is the mass. Alternatively, K can also be found by plotting a graph of displacement vs. time and using the slope of the line to calculate K.

2. What is the significance of the damping coefficient in a mass spring system?

The damping coefficient represents the amount of resistance in the system that causes the amplitude of the oscillations to decrease over time. It is a measure of how quickly the system loses energy and is crucial in determining the behavior of the system.

3. How can you find the acceleration of a mass in a damped mass spring system?

The acceleration of the mass can be found by using the formula a = -(K/m)x - (b/m)v, where x is the displacement, v is the velocity, K is the spring constant, b is the damping coefficient, and m is the mass. This formula takes into account both the restoring force from the spring and the damping force.

4. Can the damping coefficient be negative in a mass spring system?

Yes, the damping coefficient can be negative in a mass spring system. This indicates that the damping force is acting in the opposite direction of the velocity, causing the system to gain energy instead of losing it. This is known as overdamping and can result in a slower decay of the oscillations.

5. How does the mass affect the behavior of a damped mass spring system?

The mass affects the behavior of the system by determining the inertia and the natural frequency of the system. A heavier mass will have a lower natural frequency and will take longer to complete one oscillation. It also affects the amplitude of the oscillations, with a heavier mass resulting in smaller amplitudes.

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