Midterm Physics 132 Page 1 - 7 33 Physics 132 Midterm...

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Unformatted text preview: 7/ 33 Physics 132 Midterm Feb/11/08 Name. . .‘ Time allowed 50 minutes. Please answer all questions. You are allowed a 3x5 inch card of equations. Notelthat questions I, 3 and 4 carry 10 marks while question 2 carries 5 marks. 1) A mass of 120g is hung from a vertical spring and causes the spring to stretch by 10 cm. a) what is the spring constant? (2pts). Ifthe mass is now displaced 1 cm below the equilibrium position (take this as y=-l cm) and released b) what is the resulting frequency of oscillation? (3pts). c) Write an equation of the form y = A sin(a)t + ¢) that describes the motion of the mass where you can take r=0 as the time when the mass released (note that you must explain how you decided on which value of {If to use) (4pts). d) At which point (or points) of the motion is the speed of the mass at its maximum? (lpt) g=9.8m/s2 , 0') F= - RX: M6 4((0/ {m} : one/(3 70,59”an («41,516 "(i/:1 r ' i K Ill/71» b' 'I,r'4g‘.;-— 3 ’fl 5 )‘E’ 5m— (N m 942K} (1 (0:qu ra/sec . 3 ...
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