Name: 90 A) Air/0 fl ‘2 Section: III 9am El 11am El 2pm El 3pm
PHYS 141 - Written Homework #03
Due Date: 11:59pm on Wednesday, February 3, 2016
Black ink is recommended for a clear pdf submission; unclear work cannot receive credit.
1. (8 points) Solve pr
Name: gig/lg 7th! fl 2 Section: [II 9am III 11am El 2pm El 3pm |:|
PHYS 141 - Written Homework #04
Due Date: 11:59pm on Wednesday, February 10, 2016
Black ink is recommended for a clear pdf submission; unclear work cannot receive credit.
1. (8 points) Lik
. I
Name: 90/1/ 7475’” 9 Section: El 9am D11am El 2pm 1:! 3pm
PHYS 141 — Written Homework #01
Due Date: 11:59pm on Wednesday, January 20, 2016
All remaining Written Homework assignments are for credit. Black ink is recommended for a clear pdf
submission;
Name:_:J_O_I_LJ_f_1_'o_n
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Section: D 9am
D 11 am
D 2pm
D 3pm
PHYS 141 - Written Homework #05
Due Date: 11:59pm on Wednesday, February 17, 2016
Black ink is recommended for a clear pdf submission. All four pages must be submitted, and in order!
no - this
Name: 90 /V 7L] 0/, 9 Section: El 9am El 11am El 2pm El 3pm
PHYS 141 - Written Homework #02
Due Date: 11:59pm on Wednesday, January 27, 2016
Black ink is recommended for a clear pdf submission; unclear work cannot receive credit.
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Name: )0 ll O/l 5 Section: III 9am III 11am El 2pm El 3pm p ySID
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PHYS 141 - Written Homework #08
Due Date: 11:59pm on Wednesday, March 9, 2016
Black ink is recommended for a clear pdf submission. All four pages must be submitted, and in ord
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Name: V 1’ I 0 n 9 Section: III 9am El 11am III 2pm I] 3pm I)th
PHYS 141 - Written Homework #07
Due Date: 11:59pm on Wednesday, March 9, 2016
Black ink is recommended for a clear pdf submission. All four pages must be submitted, and in order!
1.
Chapter 3 Solutions
3.10.
IDENTIFY: The person moves in projectile motion. She must travel 1.75 m horizontally during the time she
falls 9.00 m vertically.
SET UP: Take + y downward. a x = 0, a y = +9.80 m/s 2 . v0 x = v0 , v0 y = 0.
EXECUTE: Time to fall
Chapter 5 Solutions
5.18.
r
r
IDENTIFY: (a) Consider both gliders together as a single object, apply F = ma , and solve for a. Use a in a
constant acceleration equation to find the required runway length.
r
r
(b) Apply F = ma to the second glider and solv
Formulae
(Physics 141, Final Exam)
Trigonometry Identities, Derivatives, Integrals, and Vectors
sin 2 + cos 2 = 1 ;
sin2 = 2 sin cos ;
cos2 = cos 2 sin 2 = 2 cos 2 1 = 1 2 sin 2
x n +1
dx
d
d
d n
= ln x; x n dx =
sin ax = a cos ax,
cos ax = a sin ax,
x
Chapter 11 Solutions
11.12.
IDENTIFY: Apply the first and second conditions of equilibrium to the beam.
SET UP: The boy exerts a downward force on the beam that is equal to his weight.
EXECUTE: (a) The graphs are given in Figure 11.12.
(b) x = 6.25 m when
Name:_ Section: 9am
11am
2pm
physID
3pm
3. (10 pts) (Based on 10.87) A 55 kg runner runs around the edge of a horizontal turntable
mounted on a vertical, frictionless axis through its center. The runner's velocity relative to the
earth has magnitude of
Chapter 14 Solutions
14.17.
m
. Use the information about the empty chair to calculate k.
k
SET UP: When m = 42.5 kg, T = 1.30 s.
IDENTIFY: Apply T = 2
EXECUTE: Empty chair: T = 2
m
4 2 m 4 2 (42.5 kg)
. gives k =
=
= 993 N/m.
k
T2
(1.30 s) 2
m
T 2k (2.54
Spring 2011
Physics 141 Midterm2 Practice Exam b Solutions
Phy141_mt2b_solns.pdf
Page 1/6
Spring 2011
Physics 141 Midterm2 Practice Exam b Solutions
Phy141_mt2b_solns.pdf
Page 2/6
Spring 2011
Physics 141 Midterm2 Practice Exam b Solutions
Phy141_mt2b_soln
Chapter 1 Solutions
1.22.
1.26.
IDENTIFY: Estimate the number of beats per minute and the duration of a lifetime. The volume of blood
pumped during this interval is then the volume per beat multiplied by the total beats.
SET UP: An average middle-aged (40
Chapter 10b Solutions
10.34.
IDENTIFY: Apply z = I z to the motion of the propeller and then use constant acceleration equations to
analyze the motion. W = .
1 mL2 = 1 (117 kg)(2.08 m) 2 = 42.2 kg m 2 .
SET UP: I = 12
12
EXECUTE: (a) =
I
=
1950 N m
42.2 k
Chapter 10a Solutions
10.2.
IDENTIFY: = Fl with l = rsin . Add the two torques to calculate the net torque.
SET UP: Let counterclockwise torques be positive.
EXECUTE: 1 = F1l1 = (8.00 N)(5.00 m) = 40.0 N m.
2 = + F2l2 = (12.0 N)(2.00 m)sin30.0 = +12.0 N
Chapter 13 Solutions
13.8.
IDENTIFY: Use Fg = Gm1m2 /r 2 to find the force each point mass exerts on the particle, find the net force, and
use Newtons second law to calculate the acceleration.
SET UP: Each force is attractive. The particle (mass m) is a d
Q1. On the graph shown, Construct the
vector R = A +B +C
Questions 2—7: You are given two vectors, £1 = 3 f ~ 2] and E = —4 f + 2} + 5/}, Calculate:
Q2. Thermagnitude of each vector
.»
Rst32+-(~2)t: Zlél I ) Bzdzll)2'+»(2)m+ 5"“ :2 M
Q3. The magnitude o
Problem 1. (.15 points) Two crates, one with mass 4.0 kg and the other with mass 6.0 kg, sit on
the frictionless surface of a frozen pond, 600 k
connected by a light rope (see Figure). A
woman Wearing golf shoes (so she can get
traction on the ice) pulls
Q1. (20 points) The graph below shows the velocity of an object moving on the x-axis as a
function of time. At t = 0, the object is at position x = 15m. v ‘ ‘
Velocity(m/s)
o 1 2 3 4 5 6 7 8 9 10
time (seconds)
a) Where is the particle loc
SHORT PROBLEMS (6 problems 30 points total)
Show your work and clearly circle your answers. Each problem is worth 5 points. Partial credit may be
given.
r
g
S1. A projectile is launched from the origin with initial velocity of
vo = 18.0 m/s at an angle of
MA 181
Practice Problems for Midterm 2
Spring 2011
1
1. Determine if the intergal
ln x dx converges or diverges.
0
2. Determine if the intergal
xex dx converges or diverges.
0
(1)n+1
3. Determine the sum of the series
n=0
3n+2
4n1
4. Find the arc length o
SHORT PROBLEMS (6 problems — 30 points total)
Show your work and clearly circle your answers. Each problem is worth 5 points. Partial credit may be
given.
31. A projectile is launched from the origin with initial velocity of
V0 = 18.0 m/s at an angle of
Physis 141 Practice Final Exam (made from selected problems given on past exams)
1.
o
(a) A block of mass m slides down a = 30.0
incline plane. The coefficient of kinetic friction
between the block and the surface of the incline
plane is k = 0.300. What i
1.
(a) A block of mass m slides down a 0 = 30.0°
incline plane. The coefﬁcient of kinetic ﬁ'iction . 7
between the block and the surface of the incline
plane is pg = 0.300. is the acceleration of the
box?
(b) A solid spheae of mass m, radius re and mome
Spring 2011
Physics 141 Midterm2 Practice Exam a
Phy141_mt2a.pdf
SHORT PROBLEMS (6 problems 30 points total)
Show your work and clearly circle your answers. Each problem is worth 5 points. Partial credit will be
given.
S1. A massless spring with spring co
Spring 2011
Physics 141 Midterm2 Practice Exam a Solutions
Phy141_mt2a_soln.pdf
Page 1/8
Spring 2011
Physics 141 Midterm2 Practice Exam a Solutions
Phy141_mt2a_soln.pdf
Page 2/8
Spring 2011
Physics 141 Midterm2 Practice Exam a Solutions
Phy141_mt2a_soln.p
Name: 9 7 1' [El
PHYS 141 - Written Homework #04
1. (8 points) Like problem 4.33, except that the child goes Figure 943.33
away. Keeping the magnitude of F1 and F2 the same, what
angle should F1 make to have the box move in the desired
direction? Using th
Name: 90/1) Afr/0
PHYS 141 - Written Homework #03
1. (8 points) Solve problem 3.52 in your text (13th ed. 3.56). In the end-of-chapter problems,
the blue dots are supposed to indicate the difficulty level. However, in the case of three blue
dots, sometim