# exam 3 answers - PHY2I3O NAME Avr Ewa trxAM#3 l pJ April...

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PHY 2I3O trxAM #3 April 02, 2008 l , NAME Avr Ewa. l( pJ STUDENT rD All questions carry 2 points each. Total points: 26. you need to get 25 points for full score. I point bonus. l. The position of a mass on a spring is given by .r/J = (0.34 m) sin (6.28 t). Whar is the maximum relocitl ofthe mass? lf * (*)= ,A5'^ /u,t\ r\en 7r , 7S- cos ld\ "^J 1r-,. ql ) ' {c.az'!)(c',,tt -\ ?,r3 t/s 2. A mass oscillating on a spring has amplitude A. IfA is doubled, the total energy oflhe system isl {o, o^ .\1".1 ^ S }+ n , E"'"'+Yf'.{-v',JY^' sa r{ A ': J".[\.J F*".'ly/:a), .1 .Jr,[' -r y-i"p u1 - {-.\". -r 4 oscillation? A) halved. l/4 as much. cannot bc determined. c) D) 3. A 0.50 kg mass is suspended from a string, forming a pendulum. The pe od ofthis pendulum is 1.5 s when the amplitude is 1.0 cm. The mass ofthe pendulum is now reduced to 0.25 kg and is increased to 2.0 cm. What is the new period of a\p {r.lu"^,l "^) p.,.") .l os.,\1A."1. ):f) ol\L "^ \{.\l'- +Lo ro-)rh. tufa.J* L )""t noJ .L,,qo ,+L" )"., ^.t .L-j; S'^6 s A) 0.34 m/s 5. po",")

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B) 145 N. 4. A string with a length of l.20mhasamassof 4.00x10-r kg. Th€ velocity ofwave propagation along the string is 185 n/s. The tension ofthe stretched strine is: A) 162 N.
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## This test prep was uploaded on 04/18/2008 for the course PHY 2130 taught by Professor Rehse during the Spring '08 term at Wayne State University.

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exam 3 answers - PHY2I3O NAME Avr Ewa trxAM#3 l pJ April...

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