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
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
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
$*
lf
gY6tuLg
u.
01ffi#i,
u"*8,".
asmall car weighing 2200 lbs (mass rooo r.gl
,ro.n
Exam 2: Tomorrow 8:20-10:10pm
Room Assignments:
Last Name
Breakdown of the 20 Problems
Room
Material
# of Problems
A-H
NRN 137
Chapter 7
7
I-P
CLB C130
Chapter 8
6
Q-Z
WEIM 1064
Chapter 9
4
Chapter 10
3
You may bring a single hand written formula sheet
I
. A massive
disk with rotational inertia 1= 5.0 kg . *' is initially rotating with angular
velocity (Do =20rad/s. Then, a constant torque is applied for a period of 4.0 s, causing
the disk to stop rotating (i.e., a.r = 0 ). What was the magnitude of the
l.
j,
For the usual unit vectors i,
and,t, which point in the -r, y, and z-directions,
respectively, which of the following equations is correct?
A) i".i =s
B) i*) =-j"i
C) i"i =-i"i
,vf
FCR AI$Y
fruO VECT(:G ;
A,'E
tr*i =-i*i
- -8" A-
E) *"i =i
2. Assumi
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
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
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 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