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Giambattista et al - Physics 3/e (Homework)

James Finch

Physics - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 8 / 10

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
–/1 –/1 –/2 –/2 –/1 –/3
Total
8/10 (80.0%)

  • Instructions

    Physics 3rd edition by Giambattista, Richardson, and Richardson, published by McGraw-Hill Higher Education, builds a conceptual framework as motivation for the physical principles to address the needs of today's students. The WebAssign component for this text engages students with immediate feedback, conceptual questions, and end-of-chapter exercises directly from the text.

    All questions in this sample assignment represent standard end-of-chapter problems.

    Questions 2 and 4 use physPad for entry of symbolic expressions.

    Questions 4 and 6 are multi-part questions that use different answer modes, including numeric, symbolic, and multiple choice.

    View the complete list of WebAssign questions available for this textbook.

Assignment Submission

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.

Assignment Scoring

Your last submission is used for your score.

1. –/1 points GRRPhys3 4.P.082. My Notes
Question Part
Points
Submissions Used
1
–/1
0/100
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–/1
 
A train engine pulls out of a station along a straight horizontal track with five identical freight cars behind it, each of which weighs 95.0 kN. The train reaches a speed of 16.0 m/s within 6.25 min of starting out. Assuming the engine pulls with a constant force during this interval, and ignore air resistance and friction on the freight cars. Find the tension in the coupling between cars 2 and 3.
kN
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2. –/1 points GRRPhys3 4.P.095. My Notes
Question Part
Points
Submissions Used
1
–/1
0/100
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–/1
 
Two blocks, masses m1 and m2, are connected by a massless cord as seen below. If the two blocks are pulled with a constant tension on a frictionless surface by applying a force of magnitude T2 to a second cord connected to m2, what is the ratio of the tensions in the two cords T1/T2 in terms of the masses? (Use the following as necessary: m1, and m2.)
T1
T2
 		=
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3. –/2 points GRRPhys3 4.P.011. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/100 0/100
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–/2
 
Two of Robin Hood's men are pulling a sledge loaded with some gold along a path that runs due north to their hideout. One man pulls his rope with a force of 51 N at an angle of 16° east of north and the other pulls with the same force at an angle of 16° west of north. Assume the ropes are parallel to the ground. What is the sum of these two forces on the sledge?
magnitude   N
direction  ° east of north
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4. –/2 points GRRPhys3 4.P.079. My Notes
Question Part
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1 2
–/1 –/1
0/100 0/100
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–/2
 
In a playground, two slides have different angles of incline θ1 and θ2 (θ2 > θ1). A child slides down the first at constant speed; on the second, his acceleration down the slide is a. Assume the coefficient of kinetic friction is the same for both slides.
(a) Find a in terms of θ1, θ2, and g.
a =

(b) Find the numerical value of a for θ1 = 37° and θ2 = 55°.
m/s2
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5. –/1 points GRRPhys3 4.P.115. My Notes
Question Part
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1
–/1
0/100
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–/1
 
Which of the following forces have an unlimited range? (Select all that apply.)

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6. –/3 points GRRPhys3 4.P.109. My Notes
Question Part
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1 2 3
–/1 –/1 –/1
0/100 0/100 0/100
Total
–/3
 
You are standing on a bathroom scale inside an elevator. Your weight is 136 lb, but the reading of the scale is 103 lb.
(a) What is the magnitude and direction of the acceleration of the elevator?
magnitude  m/s2
direction 

(b) Can you tell whether the elevator is speeding up or slowing down?
    
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