q6a_soln

# q6a_soln - Math 415.01 — Quiz 6 10:30 recitation(Vutha...

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Unformatted text preview: Math 415.01 — Quiz 6 - 10:30 recitation (Vutha) The following quiz is worth 25 points. You have 20 minutes to attempt it. Pleose show all work. Answers without work will receive no credit. You may use both sides of the paper. VH’chu l namemumber : (1) (17 pts) A mass of 20 g stretches a spring 20 cm. Suppose the mass is also attached to a viscous damper with a damping constant of 400 dyne — sec/ cm. If the mass is pulled down an additional 2 cm and then released, ﬁnd its position u at any time t. (2) (8 pts) Solve the given boundary value problem or else show there is no solution. 2/” + 2y = 0, y’(0) = 1, y’(7r) = 0 K: 20 Mum} fut-i- kLA-T—O ZOJ+ 4OOwI+ '”;O 7 L134. ZOUL' .4._|_ wzo LACO);2 20 UJCO); Y2+ZOY+J :O _2‘oi (GOG—4‘4 20 m 2—0 2 = “201‘ L535 20 M An: ‘33“ “CH: C43 4’9e— MCON: 4. _ 2 U'(O r. " i _. § ) AlC-i-FAZC’L ,0 C4+gv12v 4: Q: ...
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