Final_S03

# Final_S03 - Your Name Recitation Instructor's Name Physics...

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Your Name 2 I. SHORT ANSWER [35 points] Write your answers in the spaces provided. 1. An ideal spring of spring constant k 1 is cut in half, and then the two halves are connected as shown. k 1 k eff = ? What is the effective spring constant k eff of this new arrangement? (A) k 1 /4 (E) 2 k 1 answer: (B) k 1 /2 (F) 2k 1 (C) k 1 / 2 (G) 4k 1 (D) k 1 2. A uniform hoop of radius R swings as a physical pendulum through small angle oscillations about a pivot on its circumference. How does the period of this hoop pendulum compare with the period of a simple pendulum of length R swinging with the same amplitude? answer: (A) Hoop pendulum's period is shorter than the simple pendulum's. (B) Hoop pendulum's period is the same as the simple pendulum's. (C) Hoop pendulum's period is longer than the simple pendulum's. (D) It depends on which one has the greater mass. 3. (a) By sticking pieces of mass at points A on the tips of the prongs of a tuning fork, where the greatest vibration takes place, how is the fork's oscillation frequency changed? answer: (A) The frequensy is lowered . (B) The frequency is not changed noticeably. (C) The frequency is raised . (b) By sticking pieces of mass on to the fork at points B near the base of the prongs where no motion is taking place, but bending is, how is the fork's oscillation frequency changed? (A) The frequensy is lowered . answer: (B) The frequency is not changed noticeably. (C) The frequency is raised . R Pivot A A B B
Your Name 3 4. A spinning bicycle wheel of radius R and total mass M is spinning at the middle of a frictionless axle of length H whose lower end is resting on a fixed frictionless pivot. The wheel is also precessing steadily around the pivot.

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Final_S03 - Your Name Recitation Instructor's Name Physics...

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