# ps11 - M A SSA C H USE T T S I NST I T UT E OF T E C H NOL...

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M ASSAC H USE T T S I NST I T UT E OF T E C H NOL OG Y 1. ( ( ) 2. ( 3. ( ) 4. ( ) 5. ( Pres entations : P roblem 1) This was your problem last time—S how the whole solution from the last homework and for this one. P roblem 2) P r o b l e m 3 P roblem 4 Problem 5) T hink about these problems before class and come prepared to ask me about what you don’t understand. However, read through the notes I handed out first. I am expecting well-prepared presentations. F or the problem you are responsible for, I expect you to have really worked to get it right, including coming in to talk if you don’t unders tand s omething. Day 31 Day 28

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1. You did problem 6-61 for the last problem set. This time, let L=1.0 m, m = 2.0 kg, and f n = 1.3 Hz. a. Determine the spring constant, k. b. In a free vibration test, two successive peaks, A n and A n+1 , are found to have amplitudes of A n = 0.1 radians, and A n+1 = 0.03 radians. Use the concept of the logarithmic decrement to calculate the damping ratio for the system. c.
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ps11 - M A SSA C H USE T T S I NST I T UT E OF T E C H NOL...

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