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HW-Ch15 - HW-CH15 9th Edition CH15 Problems 16 40 61 70 100...

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HW-CH15 9th Edition CH15 Problems: 16, 40, 61, 70, 100 8th Edition CH15 Problems: 18, 44, 61, 84, 106 16. Two particles execute simple harmonic motion of the same amplitude and frequency along close parallel lines. They pass each other moving in opposite directions each time their displacement is half their amplitude. What is their phase dif- ference? 40. A physical pendulum consists of a meter stick that is pivoted at a small hole drilled through the stick a distance d from the 50 cm mark. The period of oscillation is 2.5 s. Find d . 61. For Eq. 15-45, suppose the amplitude x m is given by x m = F m [ m 2 ( ! 2 d ° ! 2 ) 2 + b 2 ! 2 d ] 1 = 2 ; where F m is the (constant) amplitude of the ex- ternal oscillating force exerted on the spring by the rigid support in Fig. 15-15. At resonance, what are the (a) amplitude and (b) velocity am- plitude of the oscillating object? 70. A wheel is free to rotate about its °xed axle. A spring is attached to one of its spokes a distance
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