ME 2020/2080 Spring 15 - Prob. sets 17A &17B
17A-3
17A-1
17A-2
17B-1
17B-2
17B-3
17B-4
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ME 2020/2080 Spring 15 - Prob. sets 16A &16B
16B-1
16A-1
16A-2
16B-2
16A-3
16B-3
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Memo!
According to the principles we have learned in our Dynamics classes, we know that the moment of
inertia of an object, as it decreases, will result in a higher rotational acceleration and speed. In the case
provided, we are confident that a gate, if
Horizontal Bars:
Equals:
Weight of the Gate:
Sum of Inertias:
Ybar:
806.48 lbs
6.063376
Plus every .5 ft a
lb*in^2 For a 6x4 beam (we use
Plus
Picket. = 68 pickets:
this assumption based on the
2637.72 lbs
given Observations on the back
of the page (about
ME 2020/2080 Spring 15 - Prob. sets 11B & 11C
11C-1
11B-1
Partial ans. VA = - 4 j m/s, aB = - 64 i m/s2
11B-2
3
11C-2
Ans.
= 19.25
, = -204 rad/s2
11B-3
Ans -r
11C-3
11C-4
Partial ans.
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ME 2020/2080 Spring 15 - Prob. sets 15A &15B
!5A-3 continued
15A-1
15B-1
15A-2
15B-2
15B-3
15A-3
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Michael Bowcutt (U0700573)
Shang-Yen Yang (U0763680)
MEMO
EARTHQUAKE MOTION AND VIBRATION
Earthquake motion is simply the movement of the earths surface. Put into more technical terms,
however, the plates of rock that make up the Earths surface build up e
ME 2020/2080 Spring 15 - Prob. sets 12A S& 12B
12A-3 Use relative velocity
12A-1
Ans VB = 17.42 i 5.23 j
12B-1
Use instantaneous Center of zero velocity to solve problem 12A-3
12 B-2
12A-2
Ans.
|VC|
= 8.37 m/s
12B-3
Partial ans. 0.75 rad /s
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ME 2020/2080 Spring 15 - Prob. sets 13A S& 13B
13B-1
13A-1
Partial ans: aA = 800 J m/s2
13B-2 For a wheel as shown in the figure of above problem but
with a radius of 2 ft, that is rolling without slipping, determine the
acceleration of points C and D. fo
ME 2020/2080 Spring 15 - Prob. sets 14A &14B
14B-1
14A-1
14B-2
Ans. -209 j m/s2
14A-2
14B-3
Ans. 45.2 i m/s2
14A-3
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ME EN 2300 Thermodynamics I
Department of Mechanical Engineering
University of Utah
Spring 2014
Mid-Term Exam 1
02/06/2014
7 problems, 10 pages
Total of 45 points
Name:_
ID:_
1. (5 points) True or False (Circle your answers in the box below)
(a)
(b)
(c)
(
ME EN 2300 / CH EN 2300 Thermodynamics I
Department of Mechanical Engineering
University of Utah
Spring 2015
HOMEWORK 3 (due date: 02/10/2015, 5 pm NO LATE HW ACCEPTED)
1. Is there any difference between the intensive properties of saturated vapor at a gi
Chapter 6:
The Second Law of Thermodynamics
Harder to Understand, Easier to Calculate than the first law of Thermo
Topics:
A. Introduction
B. Thermal Reservoirs and Heat Engines
C. Refrigerators and Heat Pumps
D. Reversible and Irreversible Processes
E. T
ME EN 2300 / CH EN 2300 Thermodynamics I
Department of Mechanical Engineering
University of Utah
Spring 2015
Instructor:
Prof. Mathieu Francoeur
Office: 413 CME
Phone: 801-581-5721
Email: mfrancoeur@mech.utah.edu
Office Hours:
M,W 10:00 am 11:30 am or by
B. Property diagrams
T-s and h-s diagrams used in second law analysis
" Q %
dS = $ '
# T &int rev
2
Area under the curve is the heat
transfer during an internally
reversible process
Qint rev = T dS
1
The above integration can be performed if we know th
ME EN 2300 / CH EN 2300 Thermodynamics I
Department of Mechanical Engineering
University of Utah
Spring 2015
HOMEWORK 1 (due date: 01/22/2015, 5 pm)
1. Based on unit considerations alone show that the power needed to accelerate a car of mass m
(in kg) fro
Chapter 4:
Energy Analysis of Closed Systems
Topics:
A. Moving Boundary Work
B. Energy Balance for Closed Systems
C. Specific Heats
D. Ideal Gas Properties
E. Solid and Liquid Properties
Sections to Read in the Textbook: 4.1 4.5
ME EN 2300 / CH EN 2300 Sp
Chapter 7:
Entropy
Topics:
A. Entropy
B. Property diagrams
C. T-ds relations
D. Entropy change of liquids and solids
E. Entropy change of ideal gases
F. Reversible steady-flow work
G. Isentropic efficiencies of steady-flow devices
H. Entropy balance
Secti
A. Entropy
Entropy change of pure substances
T-s diagram:
Entropy evaluated like any other properties using the tables
ME EN 2300 / CH EN 2300 Spring 2015, Department of Mechanical Engineering, University of Utah, Mathieu Francoeur
7-13
A. Entropy
Isent
Chapter 1:
Introduction and Basic Concepts
Topics:
A. Introduction
B. Units
C. Basic Definitions
D. Temperature
E. Pressure
Sections to Read in the Textbook: 1.1 1.11
ME EN 2300 / CH EN 2300 Spring 2015, Department of Mechanical Engineering, University of
Chapter 5:
Mass and Energy Analysis of Control Volumes
Topics:
A. Conservation of Mass
B. Energy of a Flowing Fluid
C. Energy Analysis of Steady-Flow Systems
D. Steady-Flow Engineering Devices
E. Energy Analysis of Unsteady-Flow Processes
Sections to Read
Total Energy of a system is E [Measured in Joules] (EXTENSIVE PROPERTY) and is the sum of the
below
o Thermal, kinetic, potential, mechanical, electric, magnetic, nuclear
o MICROSCOPIC forms of energy (Molecular/atomic level) called internal energy [U],
Work
Who does the most work?
A. the one who lifted the weight to the table
B. the one who moved the weight to the far end of the table
C. same work done.
Definition of work in physics:
Work (done by the force F): the component of force along
the displacem
Projectile motion
2-dimensional motion of an object launched non-vertically
Falls
freely (neglect air resistance unless I tell you
otherwise)
Only y motion has acceleration, force
Imagine shadow of ball on the wall.
on the ground
P1. Bob is loading his gu
Impulse
If an objects momentum has changed, we say it has
r r
received an impulse p F t .
No new physics here, just
r
r
F ma
A 100 kg defensive end running north at 4 m/s tackles a
80kg quarterback running south at 7 m/s.
Football: 100*4-80*7 = 180 v
v= -
Springsandotherstretchythings
Hookes Law:
Springsstoreenergy(conservative)
Springpotentialenergy
P1. If a spring is compressed by 20 cm, the work done
in the first 10 cm is
A.
less than
B.
the same as
C.
more than
the work done in the last 10 cm.
Hint: th