Construction Materials Lab 1:
Tensile Stress-Strain Properties of an Unknown Alloy
i
ABSTRACT
This report's objective is to provide a precise step-by-step description of how to prepare
and perform a stress-strain measurement using an extensometer to an un
Engineering Mechanics - Dynamics
Chapter 16
Given:
rad
a = 5
3
s
rad
s
b = 2
r = 0.8 m
t1 = 0.5 s
Solution: t = t1
= at + b
2
= 3.25
rad
s
= 2a t
= 5.00
rad
2
s
v = 2.60
v = r
( r)2 + (2r)
a =
2
m
s
a = 9.35
m
2
s
*Problem 16-4
The figure shows the in
Engineering Mechanics - Dynamics
Chapter 15
Solution:
vA sin ( )
W v sin ( ) W t = W 0
A
g
g
t =
W v cos ( ) + 0 =
A
g
vx = vA cos ( )
W v
x
g
t = 0.280 s
g
vx = 15.59
ft
s
Problem 15-3
A block of weight W is given an initial velocity v0 up a smoo
Engineering Mechanics - Dynamics
2sC
tC =
a
2sD
tD =
a
Chapter 13
tC = 1.54 s
tD = 2.32 s
Problem 13-3
A bar B of mass M1, originally at rest, is being towed over a series of small rollers. Determine
the force in the cable at time t if the motor M is draw
Engineering Mechanics - Dynamics
Chapter 14
Problem 14-3
The crate of mass M is subjected to a force having a constant direction and a magnitude F, where s
is measured in meters. When s = s1, the crate is moving to the right with a speed v1. Determine its
Engineering Mechanics - Dynamics
Chapter 12
Problem 12-1
A truck traveling along a straight road at speed v1, increases its speed to v2 in time t. If its
acceleration is constant, determine the distance traveled.
Given:
km
hr
v1 = 20
v2 = 120
km
hr
t = 15
Engineering Mechanics - Dynamics
Chapter 20
*Problem 20-4
The propeller of an airplane is rotating at a constant speed si, while the plane is undergoing a turn at
a constant rate t. Determine the angular acceleration of the propeller if (a) the turn is ho
Engineering Mechanics - Dynamics
a2
Iaa = m
4
+
Chapter 21
2
h
3
Problem 21-3
Determine the moments of inerta Ix and Iy
of the paraboloid of revolution. The mass
of the paraboloid is M.
Given:
M = 20 slug
r = 2 ft
h = 2 ft
Solution:
h
2 y
dy
V = r
h
=
M
Activation
energy (Q)
The energy required to produce the diffusive motion of
one mole of atoms
Engineering stress
The instantaneous load applied to a specimen
divided by its cross-sectional area before any
deformation
Fine pearlite
Allotropy
Polymorphism
5. The angular acceleration of the disk is defined by a = 4132 + 15 rad/s, Where t is
in seconds. If the disk is originally rotating at wo = 12 rad/s, determine both the
magnitude of the velocity and also the f2, and 5 components of acceleration of point
ME 131B Fluid Mechanics
Solutions to Week Eight Problem Session:
Angular Momentum Principle (3/2/98)
1. In control volume analysis, all governing principles share the same common structure:
storage = inow outow + production
The main dierence between diere
gd/mlL/bm :f: ME2302: Quiz#l % g/
1. (50 pts) The graph below shows the acceleration of a dragster as a function of
position. Where does the dragster reach a velocity of 9 ft/sec? Assume that
the dragster starts at rest. After traveling 20 feet, the drags
Engineering Mechanics - Dynamics
Chapter 17
Solution:
b
2
y3
m = a d y
b3
0
m = 0.083 slug
b
2
2
3
3
1 y y
Iy = a a d y
2 3 3
b b
0
Iy
k =
Iy = 0.201 slug in
k = 1.56 in
m
*Problem 17-4
Determine the moment of inertia Ix of the sphere and
express t
Engineering Mechanics - Dynamics
Chapter 19
HIC = rGIC mrGIC + IG
(
2
)
HIC = IG + m rGIC
HIC = IIC
Q.E.D.
Problem 19-3
Show that if a slab is rotating about a fixed axis perpendicular to the slab
and passing through its mass center G, the angular moment