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Dills SCIN 233 K001 Fall 2023 Lab 5 2/4/2024
Table 1: Slinky® Measurements
Slinky Mass (kg)
Number of Loops
Mass/Loop (kg/loop)
Length (m)
0.035kg
45
0.00065kg/loop
2
Table 2: Wave Time Measurements for Relaxed Slinky®
Trial
Time (s)
Tension Force (N)
1
0.82
0.6
2
0.93
0.6
3
0.85
0.6
4
1.00
0.6
5
0.95
0.6
Table 3: Wave Time Measurements for Increased Tension Slinky®
Trial
Time (s)
Tension Force (N)
1
0.74
1.1
2
0.70
1.1
3
0.72
1.1
4
0.69
1.1
5
0.68
1.1
Table 4: Slinky® Measurements
Trial
Velocity from
Stopwatch (m/s)
Velocity from Tension
and Mass Data (m/s)
% Difference
1
4.39m/s
1.85
81.41
2
5.66m/s
2.5
77.45
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Related Questions
The response of a certain dynamic system is given by: x(t)=0.003 cos(30t) +0.004 sin(30r) m
(5Mks)
Determino:
(i) the amplitude of motion.
(2Mks)
(ii) the period of motion.
(in) the linear frequency in Hz.
(4) the angular frequency in rad/s.
(2Mks) (2Mks)
(2Mks) (2Mks)
(v) the frequency in cpm.
(vi) the phase angle.
(2Mks)
(vii) the response of the system in the form of x(t) = X sin(t +$) m.
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r:09
moodle1.du.edu.om
An application demands that
sinusoidal pressure variation of
250 Hz be measured with no
more than 2% dynamic error. In
selecting a suitable pressure
transducer from vendor catalog,
you note that a desirable line of
transducer has a fixed natural
frequency of 500 Hz but that you
have a choice of transducer
damping ratio of between 0.5
and 1.5 in increments of 0.05.
select a suitable transducer.
The value of damping ratio is
between the following values
Select one:
O a. 0.707 and 0.807
O b. 0.631 and 0.692
c. 0.2356 and 0.5625
d. 0.5215 and 0.5625
Previous page
Next page
1 Assignmen
II
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16:55 M
O X * 16% £
Jihad Harfosh
20 minutes ago
In an oscillatory motion of a simple
pendulum, the ratio of the maximum
angular acceleration, O"max, to the
maximum angular velocity, O'max, is rt
s^(-1). What is the time needed for the
pendulum to complete one-half
ocillation?
4 sec
0.5 sec
1 sec
2 sec
0.25 sec
く
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K
Kt
m₂
mi
For this fig. > with damping
Find the following:
~Equations of motion
C
~Mass matrix
~Stiffness matrix
~Damping matrix
~Natural freqyancy
~All damping properties..
72
ZI
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i. Derive the linear and quatratic approximation of the below resistance
temperature readings(temperature from 40 °c to 80 °c). (.
ii. find out the resistance of RTD at a temperature of 200°c using linear
approximation? (
Temperature 40
45
50
55
60[TO] 65
70
75
80
Resistance
ohm
115.239 120.521 167.096 254.966 384.13 554.587 766.34 1019.38 1313.724
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A single degree-of-freedom linear elastic structure was subjected to a series of harmonic
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frequency. Forcing frequencies and observed peak steady-state displacements are shown in the graph
below. Find the natural period and damping ratio of the structure.
Displacement (mm)
60
50
40
30
20
10
0
0
1
2
.
3
4
Forcing frequency, f [Hz]
5
4.
6
7
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2/60 At time t = 0, the position vector of a particle mov-
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its position vector has become 5.1i+ 0.4j m.
Determine the magnitude vav of its average veloc-
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6. A ball is thrown straight up in the air at time t = 0. Its height y(t) is given by
y(t) = vot -
791²
(1)
Calculate:
(a) The time at which the ball hits the ground. First, make an estimate using a scaling
analysis (the inputs are g and vo and the output is the time of landing. Think about
their units and how you might construct the output using the inputs, just by matching
units). Solve the problem exactly. Verify that the scaling analysis gives you (almost)
the correct answer.
(b) The times at which the ball reaches the height v/(4g). Use the quadratic formula.
(c) The times at which the ball reaches the height v/(2g). You should find that both
solutions are identical. What does this indicate physically?
(d) The times at which the ball reaches the height v/g. What is the physical interpretation
of your solutions?
(e) Does your scaling analysis provide any insight into the answers for questions (a-e)?
Discuss. (Hint: Observe how your answers depend on g and vo).
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What mathematical relationship exists between the wave speed and the density of the medium, using the POWER trendline equation from the graph? Make your response specific (i.e., describe the full mathematical proportionality between the two variables) Feel free to use the table.
Table:
Frequency (Hz)
Density (kg/m)
Tension (N)
Speed (cm/s)
Wavelength (cm)
0.85
0.1
4.0
632.5
744.12
0.85
0.7
4.0
239.0
281.18
0.85
1.3
4.0
175.4
206.35
0.85
1.9
4.0
145.1
170.70
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PIoVide ue comect u
We want to design an experiment to measure oscillations of a simple pendulum on the surface of Jupiter with acceleration due to gravity
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Lab 2-Measurement Asynch - Tagged.pdf
Page 4 of 7
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Part I: Taking Measurements & Estimating Uncertainties for a single measurement
www.stefanelli.eng.br
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3. Problem
Estimate the frictional resistance Rp for a container ship using the ITTC 1957 model-ship correlation line
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0.075
CF
[ log,,(Re) – 21
The ship has the following particulars:
Full scale ship data
length between perpendiculars Lep
length in waterline
length over wetted surface
195.40 m
Lwz
Los
For the wetted surface S you can use the following
formula by Kristensen and Lützen (2012) derived
for container ships.
200.35 m
205.65 m
breadth
B
29.80 m
draft
T
10.10 m
37085.01 m3
S = 5 + Lw. T
0.995
displacement
design speed
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V
21.00 kn
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x(1) = n(2)
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b) Use MATLAB to compute the complex ambiguity function and compare it to part (a).
c) Now, consider the pulse
x(t) = sinc(Bt)
i) Derive the complex ambiguity function for x(t) and compare to the ambiguity function
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ii) Plot the ambiguity function using the mesh function and using the contour function.
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dt²
Use this information to find the spring constant. (Use g = 9.8 meters/second²)
m
k
=
+ kx
The previous mass is detached from the spring and a mass of 17 kilograms is attached. This mass is
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Write the equation of motion in the form x(t) = c₁ cos(wt) + c₂ sin(wt). Do not leave unknown constants
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x(t) =
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Collar A is free to slide with negligible friction on the circular guide mounted in a vertical frame.
Find the EOM of collar A if the frame is given a velocity v and a constant horizontal acceleration
a to the right.
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A mechanical system is presented as
below. There are four simulation
graphs for different values for m, b
and c tested for a step response.
Identify the graph for m=4 kg, b=0.3
N.s/m and k=1 N/m (Hint: you may
need to use matlab simulation to find
it).
m
1.8
1.6
1.4
b
·f(t)
Step Response
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5 Problem
Match the following two frequency response diagrams:
-0
0.4
|G(i w)|
0.2
10
|G(i w)|
5
Response A
2
3
4
5
6
7
8
Frequency, (rad/s)
Response B
5
6
7
8
Frequency, w(rad/s)
1
2
3
4
6
6
10
10
10
to two of the following ODES
1. +x+100x = u(t)
5.
+100x = u(t)
9. +100x = u(t)
3. x+x+5x= u(t)
4. x+x+x= u(t)
2. x+x+25x = u(t)
:
6.
x +
25xu(t)
10. +25x = u(t)
7. x+5x= u(t)
8. u(t)
11.
+5x= u(t)
=
12.
xu(t)
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of 40 a
2/59 At time t = 10 s, the velocity of a particle moving in the
x-y plane is v= 0.1i+2j m/s. By time = 10.1 s, its
velocity has become -0.1i + 1.8j m/s. Determine the
magnitude aav of its average acceleration during this
interval and the angle 0 made by the average accel-
eration with the positive x-axis.
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buildings and bridges take into account the analysis of vortex shedding phenomena to
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the vortex shedding frequency. In this analysis, the following parameters are found to
be important: velocity of flow (V), density of fluid (p), hydraulic diameter of the duct
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frequency (n). Using the method of repeating variables, find the non-dimensional
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and fundamental frequency 100 Hz. The resulting steady-state
acceleration measurement is a sinusoid. What is its amplitude (in
m/s?)?
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Consider a second order system given by
10 d²x(t)/df² + 6 dx(t)/dt + 42 x(t) = 4 cost.
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The stress profile shown below is applied to six different biological materials:
Log Time (s]
The mechanical behavior of each of the materials can be modeled as a Voigt body. In response to o,= 20 Pa
applied to each of the six materials, the following responses are obtained:
2 of
Maferial 6
Material 5
0.12
0.10
Material 4
0.08
Material 3
0.06
0.04
Material 2
0.02
Material 1
(a) Which of the materials has the highest Young's Modulus (E)? Why?
Log Time (s)
(b) Using strain value of 0.06, estimate the coefficient of viscosity (n) for Material 6.
Stress (kPa)
Strain
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0 cm
100 cm
Jrock
100g
position (cm)
weight (gwt) lever arm (cm) torque (gwt cm)
Rock
10.60
XXXXXX
XXXXXXXX
Weight 1
구군, 60
150
cw
Weight 2 93.5
100
(Q-5) Assume that the torques balance and use this fact to calculate the weight of the rock.
Z Tecw
Złcw = Wrack
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Weibull distribution with mean life 83 h, shape parameter 1.5, and location parameter zero.
When it fails it takes on average 3.5 h to repair:
a) Calculate the reliability over a 25 h period, and the 'steady state' availability of the device.
b) Calculate the reliability over 25 h, and the ‘steady state' availability of a subsystem that
consists of two of these devices in active parallel redundancy.
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element
Node 1
Node 2
Your Answer:
Answer
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Harmonic oscillators. One of the simplest yet most important second-order, linear, constant-
coefficient differential equations is the equation for a harmonic oscilator. This equation models
the motion of a mass attached to a spring. The spring is attached to a vertical wall and the
mass is allowed to slide along a horizontal track. We let z denote the displacement of the mass
from its natural resting place (with x > 0 if the spring is stretched and x 0 is the
damping constant, and k> 0 is the spring constant. Newton's law states that the force acting
on the oscillator is equal to mass times acceleration. Therefore the differential equation for the
damped harmonic oscillator is
mx" + bx' + kr = 0.
(1)
k
Lui
Assume the mass m = 1.
(a) Transform Equation (1) into a system of first-order equations.
(b) For which values of k, b does this system have complex eigenvalues? Repeated eigenvalues?
Real and distinct eigenvalues?
(c) Find the general solution of this system in each case.
(d)…
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Required information
The power P generated by a certain windmill design depends upon its diameter D, the air density p, the wind velocity V,
the rotation rate 2, and the number of blades n.
A model windmill, of diameter 50 cm, develops 2.7 kW at sea level when V= 40 m/s and when rotating at 4800 rev/min. What power
will be developed by a geometrically and dynamically similar prototype, of diameter 5 m, in winds of 10 m/s at 2000 m standard
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The power developed is
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