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Halliday, Resnick, & Walker - Fund. of Physics 9/e (Homework)

James Finch

Physics - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 10 / 41

Due : Monday, January 28, 2030 00:00 EST

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5 6 7 8 9
3/13 2/3 2/3 –/4 –/3 –/1 2/4 –/9 1/1
Total
10/41 (24.4%)

  • Instructions

    Fundamentals of Physics 9/e by Halliday, Resnick, and Walker published by John Wiley & Sons, Inc. is now a WebAssign Plus selection. WebAssignPLUS includes a complete on-line version of the text, the Student Study Guide, the Student Solution Manual, and a variety of interactive study aids. All of these rich resources are linked together in a dynamic and interactive environment for students. Additional links to the eBook within each problem are structured to support the way students work and provide them with superior just-in-time learning resources. Also the eBook availability provides students with a significantly less expensive option than the printed version.

    Questions 1, 2, 5, 8, 9 are traditional end of chapter problems.

    Question 3 is a simulation problem that uses and interactive simulation in which students can manipulate initial conditions and observe their calculations in action.

    Question 4 and 6 are enhanced Go Tutorial problems. Go Tutorials use examples and figures, guiding students through steps to aid them in mastering the underlying concepts involved in the problem.

    Question 7 is a question requiring an answer using algebraic expressions.

    If you adopt Halliday et al, your students will see an option to purchase the online book on their WebAssign Homepage.

    Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions and allows you to try another version of the same question for practice.

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Assignment Scoring

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1. 3/13 points  |  Previous Answers HRW9 1.P.006. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9 10 11 12 13
1/1 1/1 1/1 –/1 –/1 0/1 –/1 –/1 0/1 0/1 0/1 0/1 0/1
1/50 1/50 1/50 0/50 0/50 1/50 0/50 0/50 1/50 1/50 1/50 1/50 1/50
Total
3/13
 
You can easily convert common units and measures electronically, but you still should be able to use a conversion table, such as those in Appendix D. The table below is part of a conversion table for a system of volume measures once common in Spain; a volume of 1 fanega is equivalent to 55.501 dm3 (cubic decimeters).
(a) Complete this table.
cahiz fanega cuartilla almude medio
1 cahiz = 1 12 48 144 288
1 fanega = Correct: Your answer is correct. 1 4 12 24
1 cuartilla = Correct: Your answer is correct. Correct: Your answer is correct. 1 3 6
1 almude = Incorrect: Your answer is incorrect. 1 2
1 medio = Incorrect: Your answer is incorrect. Incorrect: Your answer is incorrect. 1

(b) Express 28.00 almude in terms of medio.
medio

(c) Express this in cahiz.
Incorrect: Your answer is incorrect. cahiz

(d) Express this in cubic centimeters (cm3).
Incorrect: Your answer is incorrect. cm3
Set up chain-link conversions such that all the units cancel except the last, desired unit. In each conversion, make the top and bottom equivalent.
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2. 2/3 points  |  Previous Answers HRW9 3.P.015.ssm. My Notes
Question Part
Points
Submissions Used
1 2 3
1/1 0/1 1/1
1/50 3/50 1/50
Total
2/3
 
The two vectors vector a and vector b in the figure below have equal magnitudes of 9.0 m and their angles are θ1 = 30° and θ2 = 95°.
(a) Find the x and y components of their vector sum vector r .
vector r =
(2.6ˆi +11.9ˆj)
Correct: Your answer is correct.

(b) Find the magnitude of vector r .
Incorrect: Your answer is incorrect. m

(c) Find the angle vector r makes with the positive x axis.
Correct: Your answer is correct. °
Add the two vectors as in Sample Problem 3-5. That is, find the x and y components of the two vectors. Add the x components to get the net x component. Do the same for the y components. Draw the net x component and the net y component. Magnitude is determined with the Pythagorean theorem, and angle is determined with an inverse tangent.
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3. 2/3 points  |  Previous Answers HRW9 4.SIM.02. My Notes
Question Part
Points
Submissions Used
1 2 3
1/1 1/1 0/1
2/50 2/50 9/50
Total
2/3
 
Note: Use principles of physics to solve the problem and then verify your answer using the simulation.

If the range of the projectile is 4.32 m, the time-of-flight is T = 0.853 s, and air resistance is negligible, determine the following. (Assume that the acceleration due to gravity has a magnitude of g = 9.80 m/s2.)
(a) What is the launch angle of the projectile?
Correct: Your answer is correct. °

(b) What is the initial speed of the projectile?
Correct: Your answer is correct. m/s

(c) Express the maximum height reached by the projectile in terms of g and T (the time-of-flight).
ymax =
0.89
Incorrect: Your answer is incorrect.
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4. –/4 points HRW9 4.P.011.GO. My Notes
Question Part
Points
Submissions Used
1 2 3 4
–/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50
Total
–/4
 
The position r with arrow of a particle moving in an xy plane is given by r with arrow = (1.0t3 - 3t)î + (9.0 - 10t4)ĵ , with r with arrow in meters and t in seconds.
In unit-vector notation, calculate the following for t = 2.00 s.
(a) r with arrow =
m

(b) v with arrow =
m/s

(c) a with arrow =
m/s2

(d) What is the angle between the positive direction of the x axis and a line tangent to the particle's path at t = 2.00 s?
°


GO Tutorial
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5. –/3 points HRW9 4.P.034. My Notes
Question Part
Points
Submissions Used
1 2 3
–/1 –/1 –/1
0/50 0/50 0/50
Total
–/3
 
A trebuchet was a hurling machine built to attack the walls of a castle under siege. A large stone could be hurled against a wall to break apart the wall. The machine was not placed near the wall because then arrows could reach it from the castle wall. Instead, it was positioned so that the stone hit the wall during the second half of its flight. Suppose a stone is launched with a speed of v0 = 23.0 m/s and at an angle of θ0 = 41.3°.
(a) What is the speed of the stone if it hits the wall just as it reaches the top of its parabolic path?


(b) What is the speed of the stone if it hits the wall when it has descended to half that height?


(c) As a percentage, how much faster is it moving in part (b) than in part (a)?
%
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6. –/1 points HRW9 4.P.050.GO. My Notes
Question Part
Points
Submissions Used
1
–/1
0/50
Total
–/1
 
At time t = 0, a projectile is launched from ground level. At t = 2.2 s, it is displaced d = 18.5 m horizontally and h = 41.8 m vertically above the launch point. At the instant it reaches its maximum height above ground level, what is its horizontal displacement D from the launch point?
m

GO Tutorial
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7. 2/4 points  |  Previous Answers HRW9 4.SQ.044. My Notes
Question Part
Points
Submissions Used
1 2 3 4
1/1 1/1 0/1 –/1
1/50 1/50 3/50 0/50
Total
2/4
 
A baseball leaves a pitcher's hand horizontally at a speed v. The distance to the batter is d. (Ignore the effect of air resistance. Use any variable stated above along with the following as necessary: g.)
(a) How long does the ball take to travel the first half of that distance?
t =
d2v​
Correct: Your answer is correct.

(b) How long does the ball take to travel the second half?
t =
d2v​
Correct: Your answer is correct.

(c) How far does the ball fall freely during the first half?
t =
vd
Incorrect: Your answer is incorrect.

(d) How far does the ball fall freely during the second half?
t =
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8. –/9 points HRW9 15.P.090. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9
–/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
–/9
 
A particle executes linear SHM with frequency 0.58 Hz about the point x = 0. At t = 0, it has displacement x = 0.47 cm and zero velocity. Determine the following values for the motion.
(a) the period
s

(b) the angular frequency
rad/s

(c) the amplitude
cm

(d) the displacement x(t). (Use the following as necessary: t. Assume t is in seconds.)
x(t) =
cm

(e) the velocity v(t). (Use the following as necessary: t. Assume t is in seconds.)
v(t) =
cm/s

(f) the maximum speed
cm/s

(g) the magnitude of the maximum acceleration
cm/s2

(h) the displacement at t = 3.0 s
cm

(i) the speed at t = 3.0 s
cm/s
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9. 1/1 points  |  Previous Answers HRW9 16.CQ.09. My Notes
Question Part
Points
Submissions Used
1
1/1
4/50
Total
1/1
 
Strings A and B have identical lengths and linear densities, but string B is under greater tension than is string A. The figure below shows four situations, (a) through (d), in which standing wave patterns exist on the two strings. In which situations is there the possibility that strings A and B are oscillating at the same resonant frequency?
Correct: Your answer is correct.

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