Download 4 Solved Problems on Electronics of Waves in Physics | PHYS 260 and more Exams Physics in PDF only on Docsity! NAME:
Physics 260 - Fall 2010 - First Exam Practice - Solutions
Instructions
(1) Check that you have FIVE pages, including this cover page.
(2) Write your name on each page of the exam. Write Clearly. Do this now.
(3) Sign the Academic Integrity Pledge:
Iunderstand that Academic dishonesty is a serious offense that may result expulsion from the
University. In addition to any other action taken, the grade "XF" denoting "failure due to academic
dishonesty” will normally be recorded on the transcripts of students found responsible for acts of
academic dishonesty.
The work on this exam is entirely my own and I will comply with the instructions.
(4) This is a closed book exam. All bodks must be placed on the floor under your desk.
(5) Keep your exam flat on the writing desk at all times.
(6) Write your answers in this booklet on the same page as the question is written,
If you run out of space, use the back side.
(7) If you want credit, write clearly and always show your work.
(8) There are no "trick questions" in this exam. If you have a question about a problem, raise
your hand to let your instructor know.
(9) Check your answers! Did you answer the question, does your answer have units, are the units
right, is the sign right, is the quantity a vector, is the answer reasonable...?
problem # points maximum
possible
20
20
20
20
total GRADE 80
BLQiNie
NAME:
1.1, A Few Quick Questions
[7 points] (a) A 10 kg mass is attached to a rope and swings back and forth like a pendulum with a
period of 3 s. What is the length of the rope? L
i LJ ep cls
(oe 4 =P 7 sa VG ~ I
jv. = ‘y 431 = 2.24
Th f- -(S)9 (4 "
Ae
[6 points] (b) Consider the transverse wave y(x,t) = A sin(Bx +Ct+D), where A, B, C, and D are
constants. What are the wave’s speed, direction of propagation, and wavelength?
Ww
wave speed= > = Lo
k 8
wave’s direction of propagation = -* diz hod
wavelength = UA - Le
[7 points] (c) Give the equation of motion for either: 1) a mass and spring system, or 2) a pendulum, or
3) waves on a string. Say which one you chose and define any variables or parameters you use in your
equation.
radix ~ ky xX.
O ri A wl bo _
O Wei 6G
QO rypy i T
dx ov &»
Y
x
