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Ohanian and Markert - Physics for Eng and Sci 3/e (Homework)

James Finch

Physics - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 8 / 16

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

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5
8/8 –/2 –/2 –/2 –/2
Total
8/16 (50.0%)

  • Instructions

    Here are some textbook questions from Physics for Engineers and Scientists 3/e by Hans C. Ohanian and John T. Markert published by W. W. Norton & Company. 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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For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer.

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1. 8/8 points  |  Previous Answers OhanPSE3 3.P.028. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8
1/1 1/1 1/1 1/1 1/1 1/1 1/1 1/1
1/50 1/50 1/50 2/50 1/50 3/50 1/50 3/50
Total
8/8
 
Four vectors are given by the following.
vector A = 2.8î + 4.2ĵ
vector B = 1.1î + 4.5ĵ + 2.5k
vector C = 1.5î + 2ĵ + 3k
vector D = 3î + 1.5k
(a) What is the vector vector E = vector A + vector B + vector C + vector D ?
Correct: Your answer is correct. î + Correct: Your answer is correct. ĵ + Correct: Your answer is correct. k

(b) What is the vector vector F = vector A - vector B + vector C - vector D ?
Correct: Your answer is correct. î + Correct: Your answer is correct. ĵ + Correct: Your answer is correct. k

(c) What is the magnitude of vector E ?
Correct: Your answer is correct.

(d) What is the magnitude of vector F ?
Correct: Your answer is correct.
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2. –/2 points OhanPSE3 6.P.028 My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/50 0/50
Total
–/2
 
Two masses, of 2.4 kg each, connected by a string slide down a ramp making an angle of 50° with the horizontal (see figure). The mass m1 has a coefficient of kinetic friction 0.60, and the mass m2 has a coefficient of kinetic friction equal to 0.40.
(a) Find the acceleration of the masses.
m/s2

(b) Find the tension in the string.
N
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3. –/2 points OhanPSE3 7.P.024. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/50 0/50
Total
–/2
 
A 300-g mass is hung from a vertical spring, stretching it 18 cm from its old equilibrium to its new one.
(a) How much work was done by gravity?
J

(b) How much work was done by the spring?
J
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4. –/2 points OhanPSE3 22.P.038. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/50 0/50
Total
–/2
 
Point charges +Q and -2Q are separated by a distance d. A point charge q is equidistant from these charges, at a distance x from their midpoint (see figure). What is the electric force on q? (Use k for the Coulomb constant, Q, q, x, and d as necessary.)
x-component Click here to preview your answer.
y-component Click here to preview your answer.
Click here for help with symbolic formatting.
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5. –/2 points OhanPSE3 29.P.008. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/50 0/50
Total
–/2
 
An electron is traveling with a velocity of 1.80 106 m/s at an angle of 120° to the direction of a 0.282-T magnetic field that points along the x axis (see figure). What is the force on the electron?
magnitude N
direction
    
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