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PHYS 101 : 1997 answers.pdf

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goldhedgehog288
11 Oct 2012
School
McGill University
Department
Physics
Course
PHYS 101
Professor
sholtz

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coffeemanatee724 and 28 others unlocked
PHYS 101 Full Course Notes
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PHYS 101 Full Course Notes
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Document Summary

Part a this part of the examination consists of questions 1 to 20. Blacken the letter that corresponds to the answer you have chosen. This part of the examination consists of questions 21, 22, 23, 24 and 25. Choose any four (4) of these questions and answer them. Circle the four (4) questions you want marked. If you answer all five (5) questions, only questions 21-24 will be corrected. The critical angle is : justify your answer. This part of the examination consists of questions 26, 27, 28, 29, 30, 31 and 32. Choose any six (6) of these questions and answer them in. Circle the six (6) questions you want marked. If you answer all seven (7) questions, only 26-31 will be corrected. Both cars have the same displacement at . The spring with the greater force constant is . The efficiency of this pulley system is . The minimum speed of the car at point a .

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Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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Related Questions

(a) With the aid of a practical example (two tables), explain the SQL 
statement below:
SELECT FIRST_NAME, LAST_NAME, SCHOOL_FEE4
FROM STUDENT, FEE_PAYMENT
WHERE STUDENT.STUDENT_ID = FEE_PAYMENT.STUDENT_ID
ORDER BY FIRST_NAME AP(5)
(b)Using the following passwords “ABCefg12” and “KojoGiggs12” as 
examples, discuss the strengths and weaknesses of each password and 
discuss what could be done to strengthen them, if they are weak 
passwords. AN(8)
(c) Assuming your exam answer booklet for this course in the end of 
semester exams is flagged (indicated) by your antivirus as being infected 
with a virus but you have just about 5 hours to submit/upload your 
answer booklet to lemsas.net. Discuss what you would do to avoid not 
submitting your answer booklet and thereby not failing the course.

Please show me how to solve this problem.
I will give proper respect as soon as possible. PLEEEASEhelpme!!!
I hope you can help me with all questions, but if you can helpwithonly a few I would be so happy.

I solved A through C. But D is a different answer that whattheteacher gave me. So, I could not solve E though I. I hope youcanhelp me with this part.

P.S. This my answer agrees with the books answer but theteachersaid that the book is wrong. So I am a littleconfused.

11#1
A coil spring hangs from the ceiling. When a mass of 50g isfastenedto the lower end, the spring is stretched a distance of15.89 cm. Ifthe mass is now pulled down another 5 cm and released,it willvibrate up and down with SHM.
Find
(a) the spring constant
K=F/X so, K=(0.5kg)(9.8m/s2) / 0.1589m = 30.837N/m
(the teacher gave me to answer is3.0837N/m)
(Books Ans. 30.837N/m)

(b) the period of vibration
T=2π√(m/K) so, T=2π√(0.5kg/30.837Nm) =0.8001s

(c) the frequency
frequency=1/T so, frequency=1/0.8001 = 1.2499Hz

(d)the angular velocity of a graph point drawn forthevibration
ω=2π/T so, ω=2π/0.8001 = 5.027rad/s (but the teachergave me to answer is7.85rod/sec)

(e)the maximum velocity of the mass
Ans. 0.39265m/s

and(f)its maximum acceleration
Ans. a = -3.081m/s2 (the teacher gave methisanswre)
(Books Ans. 0.4754m/s2)

(h)find the time to reach the first maximum
Ans. time =0.4sec (the teacher gave me thisanswer)
(Books Ans. 4.001s)

and (i)the total energy of vibration
Ans. 0.00385J (the teacher gave me this answer)
(Books Ans 3.8546J)

(j)write down an equation for the motion
y=0.050sin(7.85t+4.71ROD)(theteacher gave me this answer)

a.A sinewave has a period (duration of one cycle) of 645 μs. What is the corresponding frequency of this sinewave, in kHz, expressed to 3 significant figures? (See Study Note 7.1 in the ‘Using Numbers (maths)’ booklet.)

A (i) If the frequency of the sinewave is now reduced by a factor of 3.5, what will be the new period value? Express your answer in ms, to 3 significant figures.

Note: In the second part of this question, to avoid rounding errors in your calculations, use the full frequency value from the first part, not the rounded value to 3 significant figures.