Oscillations

1. Oscillations

2. A mass connected to a spring is oscillating back and forth. Consider two possibilities.Which are true?(i) at some point during the oscillation the mass has v = 0 but a ≠0 (ii) at some point during the oscillation the mass has v = 0 and a = 0 . • Both occur sometime during the oscillation. • Neither occurs during the oscillation. • Only (i) occurs. • Only (ii) occurs. NEXUS/Physics Clicker Questions

3. x x x x Tracking the motion 0 0 0 0 NEXUS/Physics Clicker Questions 0 0 0 0

4. If curve (A) is which curve is • (A) • (B) • (C) • None of the above. NEXUS/Physics Clicker Questions

5. Which of these curvesis described by with φ > 0 (and φ<< 2π)? • (A) • (B) • (C) • None of the above. NEXUS/Physics Clicker Questions

6. When we pull the mass down from its equilibrium and release it, what happens to the energies? The gravitational PE • increases • decreases • remains the same • you can’t tell from the information given. NEXUS/Physics Clicker Questions

7. When we pull the mass down from its equilibrium and release it, what happens to the energies? The spring PE • increases • decreases • remains the same • you can’t tell from the information given. NEXUS/Physics Clicker Questions

8. When we push the mass upfrom its equilibrium and release it, what happens to the energies? The gravitational PE • increases • decreases • remains the same • you can’t tell from the information given. NEXUS/Physics Clicker Questions

9. When we push the mass upfrom its equilibrium and release it, what happens to the energies? The springPE • increases • decreases • remains the same • you can’t tell from the information given. NEXUS/Physics Clicker Questions

10. A mass is hanging from a spring. The position of the mass is measured by a sonic ranger sitting 25 cm under the mass’s equilibrium position. At some time, the mass is started oscillating. At a later time, the sonic ranger begins to take data.Which graph could represent thevelocity of the mass? NEXUS/Physics Clicker Questions

11. A mass is hanging from a spring. The position of the mass is measured by a sonic ranger sitting 25 cm under the mass’s equilibrium position. At some time, the mass is started oscillating. At a later time, the sonic ranger begins to take data.Which graph could represent thenet forceon the mass? NEXUS/Physics Clicker Questions

12. A mass is hanging from a spring. The position of the mass is measured by a sonic ranger sitting 25 cm under the mass’s equilibrium position. At some time, the mass is started oscillating. At a later time, the sonic ranger begins to take data.Which graph could represent thepotential energyof the spring? NEXUS/Physics Clicker Questions

13. A pendulum is swinging back and forth between the extremes marked A and C. At point B it is directly below the pivot. When it reaches B, the string breaks. What path will the ball follow after the break? NEXUS/Physics Clicker Questions

14. A pendulum is swinging back and forth between the extremes marked A and C. At point B it is directly below the pivot. When it reaches C, the string breaks. What path will the ball follow after the break? NEXUS/Physics Clicker Questions

15. A pendulum swings in the plane in front of the marked board. There is a peg (indicated). When the ball passes the peg it will pivot from the peg instead of from the original pivot. How high will it go on the right? • Not as high as the 30 cm line. • Just up to the 30 cm line. • Higher than the 30 cm line. • You don’t have enough information to tell. peg NEXUS/Physics Clicker Questions