This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: e" 5ec/h'0n'3 l‘vl 1 . ‘ 'l I
Grifﬁth “— ‘ .I Ph sics 132‘ Name 50 LU T1 C N
(numbgt'fw citqﬁ'iﬂl ﬁn” ear;le Seal—l on 1. (10 points) A block hangs at rest on a vertical spring at position y = O. The block has
mass 25 grams and the spring constant is 3 N/m. The spring is massless. Praveet pulls the mass down below equilibrium, so that it is at y =  3.5 cm, then lets go.
His lab partner, Asif, starts the stopwatch (ie sets t = 0) when the mass is at y =  1.0 cm and moving up. Assume that the mass is an undﬁpedoallator. (a) Make a sketch of the situation at t = 0 seconds. Include the +y axis and position of [ray—— the block. . I.”
(b) Find the amplitude of the oscillation. in = O . D 15 k a,
(c) What is the phase constant? N .. (d) What is the maximum acceleration of the block? l l< 1: g /m. r,— R_. ,\'\—_T\ CC; Co.\3ft1n+/ gig: —
.o T
\ 7(tit5ﬁﬂw; (yw‘€+{4> x xv _
 I » .r— ’7 ' 0:
Y” " CM“ ‘ v ,blm ’ (Cotbgi§ W {246 «L‘Eblm ,   ’Z I‘ ' I .—
\ — c.2189? ‘ 0m 14; Cut t 0/ 7 5 ___ . _ n q‘hnve, IJUL‘i’ ‘_
we _r i and "9 a3 a“, madam? 36.10
_ \ o.’ j‘htf‘u). . i ._ t . . _
Jug, (e) How much k1net1c energy does the block have when y — 0? lo)
6W7: 4 C) 1,. £1) How much kinetic energy does the block have when y = 1 cm? A ‘: 0' 0 5 5 m. Y x
. ‘ r. 0 Lt: = ‘ [gm I I I I“
Q J to) C ‘ Vmaya3l/«JA ’— L/logii;3_ t: :ﬂ“;/I/dl o .H p .‘
Vl. \\ Vina; ‘J—@ ’3 Ina/5 __ ’(0. 535% 9%» Law.» ‘ I I \ ganjfﬁgm Grifﬁth 5“; W 2’ Physics132 Name Swallow 2. (10 points) To send a signal to her sister in a tree fort, Sally oscillates the end of a 20
meterlong rope. The tension of the rope is 5.0 N and its mass is 1.5 kg. Assume that the
wave has not yet reached the other end of the rope. A snapshot graph (displacement versus time) of the string at t = 0 is shown below. A : 5W
09111'on ’ T C}_O§rn 1.4 . I
m Z 0,?) :'V\ i w _______l  , 0
(a) What is the wavelength of the wave? "l 9" f * l' (b) What is the frequency at which she is oscillating the rope? (c) Sally's sister is in the +x direction. The end of the rope that Sally is holding (x = 0)
has displacement D = 2.5 cm at t = 0 (as shown above). Write an equation that describes
the displacement of the rope as a function of x and t. The equation should use numbers . and units, but have no unknowns. (You will need to calculate the phase constant and (9
include it in this equation.) I 19”?
(d) Estimate the displacementof the string at _~= 0.55 seconds and x = 0.25 m. 7‘5 ' 5, (e) Draw a history graph (D vs t) at x @2391: ully label the plot (axes, units, values). f” r“ z #16 " ﬁ131§.f_9?_5_%j/“ Name 90 Grifﬁth Physics 132 3. (5 points) A 2.5 kHz sound wave travels in air, with speed 340 m/s. (a) What is the wavelength of the sound?
(b) What is the phase difference between two points that are 7.0 cm apart, along the direction that the wave is traveling?
“g :— 25: .9 K H IE 15': 2600 Hz: a 1 3” C "“‘/_s 3;; : x l 1g 2‘500Ht PM? {DiffM); ’. 4’ 7L : 7L6???
I . I A» “ " i
m tea < >0 :1 {Le Eva. (a'0?'“ 3 '5 i\ II
t l
\\ '3
:03 '
N \N I
3%
' E?
f\
7(— ‘u
\l
4:
.G‘
y;
mi
\ ...
View
Full Document
 Fall '08
 Sharpe
 Physics

Click to edit the document details