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Serway and Jewett - Principles of Physics 3/e (Homework)

James Finch

Physics - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 2 / 18

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

Last Saved : n/a Saving...  ()

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0/4 2/6 0/3 0/2 0/3
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2/18 (11.1%)

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1. 0/4 points  |  Previous Answers SJ3 1.P.043. My Notes
Question Part
Points
Submissions Used
1 2 3 4
0/1 0/1 0/1 0/1
1/50 1/50 1/50 1/50
Total
0/4
 
Three vectors of a croquet ball are oriented as shown in Figure P1.43, where |A| = 22.0, |B| = 38.0 and |C| = 25.0 units.


Figure P1.43

(a) Find the x and y components of the resultant vector.
x = Incorrect: Your answer is incorrect.
y = Incorrect: Your answer is incorrect.
(b) Find the magnitude and direction of the resultant vector.
Incorrect: Your answer is incorrect. units
Incorrect: Your answer is incorrect. ° (counterclockwise from the +x axis)
Your work in question(s) will also be submitted or saved.
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2. 2/6 points  |  Previous Answers SJ3 2.P.013. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6
1/1 0/1 0/1 0/1 1/1 0/1
1/50 1/50 1/50 4/50 5/50 1/50
Total
2/6
 
Figure P2.13 shows a graph of v versus t for the motion of a motorcyclist as he starts from rest and moves along the road in a straight line.


Figure P2.13

(a) Find the average acceleration for the time interval t0 = 0 to t1 = 2.0 s.
Correct: Your answer is correct. m/s2
(b) Estimate the time at which the acceleration has its greatest positive value.
Incorrect: Your answer is incorrect. s
What is the value of the acceleration at that instant?
Incorrect: Your answer is incorrect. m/s2
(c) When is the acceleration zero?
Incorrect: Your answer is incorrect. s
(d) Estimate the maximum negative value of the acceleration.
Correct: Your answer is correct. m/s2
At what time does it occur?
Incorrect: Your answer is incorrect. s
Your work in question(s) will also be submitted or saved.
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3. 0/3 points  |  Previous Answers SJ3 3.P.031. My Notes
Question Part
Points
Submissions Used
1 2 3
0/1 0/1 0/1
1/50 1/50 1/50
Total
0/3
 
Figure P3.31 represents the total acceleration of a particle moving clockwise in a circle of radius 4.50 m at a certain time.(a = 10.0 m/s2)


Figure P3.31

(a) At this instant, find the radial acceleration.
Incorrect: Your answer is incorrect. m/s2 (toward the center)

(b) At this instant, find the speed of the particle.

Incorrect: Your answer is incorrect. m/s

(c) At this instant, find its tangential acceleration.

Incorrect: Your answer is incorrect. m/s2 (in the direction of the motion)
Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
4. 0/2 points  |  Previous Answers SJ3 4.P.026. My Notes
Question Part
Points
Submissions Used
1 2
0/1 0/1
1/50 1/50
Total
0/2
 
A mass m1 = 8.00 kg, placed on a frictionless, horizontal table is connected to a cable that passes over a pulley and then is fastened to a hanging mass m2 = 14.0 kg, as in Figure P4.26. Draw free-body diagrams of both masses. (Do this on paper. Your instructor may ask you to turn in these diagrams.)
Find the acceleration of the two objects toward the pulley and downward, respectively.
Incorrect: Your answer is incorrect. m/s2
What is the tension in the string?
Incorrect: Your answer is incorrect. N


Figure P4.26

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5. 0/3 points  |  Previous Answers SJ3 5.P.016. My Notes
Question Part
Points
Submissions Used
1 2 3
0/1 0/1 0/1
1/50 1/50 1/50
Total
0/3
 
Consider a conical pendulum with an 82.5 kg bob on a 10.3 m wire making an angle of 4.60° with the vertical (Fig. P5.16).


Figure P5.16.


(a) Determine the horizontal and vertical components of the force exerted by the wire on the pendulum.
Incorrect: Your answer is incorrect. N i + Incorrect: Your answer is incorrect. N j
(b) Determine the centripetal acceleration of the bob.
Incorrect: Your answer is incorrect. m/s2
Your work in question(s) will also be submitted or saved.
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