Unformatted text preview: Physics 133, 9:30 section, Autumn 2010 7 Name Recitation Instructor (circle one): Albert Dainton Patton Schmidt Smith Zizka QUIZ #2 October 7, 2009 25 points, 18 minutes SCORE
Some equations: y(x,t) = Zym cos(¢/2) Sin(kx :l: 0) t + (b/Z) y(x,t) = 2ym sin(kx) 008(0) t) V = 17/ [1 Problem 1. A string with linear mass density p. is ﬁxed at one end 'and runs y
over a rod, supporting a block of mass M. The string segment between the
ﬁxed end and the rod has length L. This segment is excited into a standing
wave at the lowest possible frequency with a maximum amplitude of A. I L l
(a) [10 points] Write an equation in symbolic form for the standing wave using
[4, M, L, A, and g. iuwéi’ ($91.7 let-«305i (Malawi/L (b) [5 pom s «9
8/3: "A“ 5i“(k><) sin-(aw me _‘) J5 e argest speed a string particle can have? Problem 3 [5 points]. A transverse, string wave pulse
starts at large negative x and travels in the +x direction.
The graph to the right shows the pulse at d . (+y is up,
+x is to the right.) The direction of the instantaneous - e ' . f the string particle at x = P is:
(2) l (3) —> (4) \ (5) / (6) not deﬁned since the instantaneous velocity is zero Lo} waZ "‘0 Vt an l'l‘H’le -.~ at T
W70 V mover) M; ...
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