Name (Print) : _Name (Signature) : _
Student ID #: _
Physics 1321
Exam III Spring 2013
Chapters 11-15
Bubble in your name, Seven Digit MyUH ID# and your answers on the scantron sheet. USE
A #2 PENCIL.
1. (5 points) A solid disk of radius 1.60 m and mass 2
Equation Sheet for Exam 3
For this exam, always assume: g = 10 m/s2
= 3.14
sin 0 = cos = sin = cos 3 = 0;
2
2
cos 0 = sin = 1;
2
1
sin 30 = sin = 2 ; cos 30 = cos =
6
6
sin 45 = sin =
4
sin 60 = sin =
3
If f (x) = axn ,
2
2
3
2
= 0.71;
3
2
cos = si
Equation Sheet for Exam 2
On this exam, always assume g = 10 m/s2 .
= 3.14; arc length s = r; circumference of a circle C = 2r; 1 rev = 2 rad
Potential energy: UAB = WAB . Work-energy theorem: Wnet = K. Conservation
of mechanical energy: K + U = 0 (if
l.
j,
For the usual unit vectors i,
and,t, which point in the -r, y, and z-directions,
respectively, which of the following equations is correct?
A) i".i =s
B) i*) =-j"i
C) i"i =-i"i
,vf
FCR AI$Y
fruO VECT(:G ;
A,'E
tr*i =-i*i
- -8" A-
E) *"i =i
2. Assumi
I
. A massive
disk with rotational inertia 1= 5.0 kg . *' is initially rotating with angular
velocity (Do =20rad/s. Then, a constant torque is applied for a period of 4.0 s, causing
the disk to stop rotating (i.e., a.r = 0 ). What was the magnitude of the
Exam 2: Tomorrow 8:20-10:10pm
Room Assignments:
Last Name
Breakdown of the 20 Problems
Room
Material
# of Problems
A-H
NRN 137
Chapter 7
7
I-P
CLB C130
Chapter 8
6
Q-Z
WEIM 1064
Chapter 9
4
Chapter 10
3
You may bring a single hand written formula sheet
1. An object is launched from ground level at an angle 0 : 30 degrees with respect to
ak f * *
2.
(+r)
| 'tfq* r#
,d
_
= voG*rB ?cfw_t
j
S)
;> t* " ffi*9= r$*KXg$ * ro s
$*
lf
gY6tuLg
u.
01ffi#i,
u"*8,".
asmall car weighing 2200 lbs (mass rooo r.gl
,ro.n
l.
A ball with mass m = 2.0 kg is connected by a string to a fixed point on the ceiling.
The ball moves with
illustrated in the figure. / The length of the string is Z : 0.50 m and the angle 0 between
direction is 30 degrees. what is the tension in the
st
PHYS 211 Final Exam
Spring 2014
Sample 2 Solutions
1) A waiter is in an elevator, holding a stack of dishes. As observed by someone
standing still on the ground floor, watching the elevator move down towards them with
constant speed, what is the sign of t
syed (ths529) HW07 tsoi (55470)
This print-out should have 25 questions.
Multiple-choice questions may continue on
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before answering.
001 10.0 points
An abstract sculpture consists of a ball (radius
R = 62 cm) resti
Version 032 TEST03 tsoi (55470)
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Multiple-choice questions may continue on
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before answering.
001 10.0 points
A uniform 48 kg beam at an angle of 25 with
respect to the horizo
syed (ths529) HW09 tsoi (55470)
s
This print-out should have 26 questions.
2 (5.75 N) (0.812 m)
=
Multiple-choice questions may continue on
0.0004 kg m2
the next column or page find all choices
before answering.
= 152.791 rad/s .
001 10.0 points
The top i
syed (ths529) HW03 tsoi (55470)
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Multiple-choice questions may continue on
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before answering.
001 10.0 points
Consider the following situations.
A) An object travels as a proj
syed (ths529) HW11 tsoi (55470)
1
This print-out should have 26 questions.
Multiple-choice questions may continue on
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before answering.
which makes the ball oscillate with angular
frequency
r
k
=
(6)
M
001 10.0 poin
syed (ths529) HW12 tsoi (55470)
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Multiple-choice questions may continue on
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before answering.
001 10.0 points
When a sound wave moves past a point in
air, what happens to the
syed (ths529) HW02 tsoi (55470)
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Multiple-choice questions may continue on
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before answering.
001 10.0 points
A river flows with a uniform velocity v. A
person in a motorboat
syed (ths529) HW13 tsoi (55470)
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Multiple-choice questions may continue on
the next column or page find all choices
before answering.
001 10.0 points
Why is the gas pressure inside an inflated
balloon always greater
syed (ths529) HW08 tsoi (55470)
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Multiple-choice questions may continue on
the next column or page nd all choices
before answering.
001 (part 1 of 2) 10.0 points
A record has an angular speed
52.8 rev/min.
What is i
syed (ths529) HW10 tsoi (55470)
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Multiple-choice questions may continue on
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before answering.
001 (part 1 of 2) 10.0 points
Hint: sin2 + cos2 = 1 .
Consider the 634 N weight h
Equation Sheet for Exam 1
sin2 + cos2 = 1
sin 0 = cos = sin = cos 3 = 0;
2
2
sin 30 =
sin 45 =
sin 60 =
1
2 = 0.500;
2
2 = 0.707;
3
2 = 0.866;
cos 0 = sin = 1;
2
cos 45 =
3
2
2
2
cos 60 =
1
2
cos 30 =
cos = sin 3 = 1
2
= 0.866;
tan 30 =
sin 30
cos 30