PHYSICS FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH

PHYSICS FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E Chapter 15 Quick. Check Questions RANDALL D. KNIGHT © 2017 Pearson Education, Inc.

Quick. Check 15. 1 Which oscillation (or oscillations) is SHM? D. A and B but not C. E. None are. © 2017 Pearson Education, Inc. Slide 15 -2

Quick. Check 15. 1 Which oscillation (or oscillations) is SHM? D. A and B but not C. E. None are. © 2017 Pearson Education, Inc. Slide 15 -3

Quick. Check 15. 2 This is the position graph of a mass oscillating on a horizontal spring. What is the phase constant ϕ 0? A. –π/2 rad B. 0 rad C. π/2 rad D. π rad E. None of these © 2017 Pearson Education, Inc. Slide 15 -4

Quick. Check 15. 2 This is the position graph of a mass oscillating on a horizontal spring. What is the phase constant ϕ 0? A. –π/2 rad B. 0 rad C. π/2 rad D. π rad E. None of these © 2017 Pearson Education, Inc. Initial conditions: x=0 vx > 0 Slide 15 -5

Quick. Check 15. 3 This is the position graph of a mass oscillating on a horizontal spring. What is the phase constant ϕ 0? A. –π /2 rad B. 0 rad C. π /2 rad D. π rad E. None of these © 2017 Pearson Education, Inc. Slide 15 -6

Quick. Check 15. 3 This is the position graph of a mass oscillating on a horizontal spring. What is the phase constant ϕ 0? A. –π /2 rad B. 0 rad C. π /2 rad D. π rad E. None of these © 2017 Pearson Education, Inc. Initial conditions: x = –A vx = 0 Slide 15 -7

Quick. Check 15. 4 The figure shows four oscillators at t = 0. For which is the phase constant ϕ 0 =–π /4? © 2017 Pearson Education, Inc. Slide 15 -8

Quick. Check 15. 4 The figure shows four oscillators at t = 0. For which is the phase constant ϕ 0 =–π /4? Initial conditions: x = 0. 71 A vx > 0 © 2017 Pearson Education, Inc. Slide 15 -9

Quick. Check 15. 5 A block oscillates on a very long horizontal spring. The graph shows the block’s kinetic energy as a function of position. What is the spring constant? A. B. C. D. E. 1 N/m 2 N/m 4 N/m 8 N/m I have no idea. © 2017 Pearson Education, Inc. Slide 15 -10

Quick. Check 15. 5 A block oscillates on a very long horizontal spring. The graph shows the block’s kinetic energy as a function of position. What is the spring constant? A. B. C. D. E. 1 N/m 2 N/m 4 N/m 8 N/m I have no idea. © 2017 Pearson Education, Inc. Slide 15 -11

Quick. Check 15. 6 A mass oscillates on a horizontal spring with period T = 2. 0 s. If the amplitude of the oscillation is doubled, the new period will be A. 1. 0 s B. 1. 4 s C. 2. 0 s D. 2. 8 s E. 4. 0 s © 2017 Pearson Education, Inc. Slide 15 -12

Quick. Check 15. 6 A mass oscillates on a horizontal spring with period T = 2. 0 s. If the amplitude of the oscillation is doubled, the new period will be A. 1. 0 s B. 1. 4 s C. 2. 0 s D. 2. 8 s E. 4. 0 s © 2017 Pearson Education, Inc. Slide 15 -13

Quick. Check 15. 7 A block of mass m oscillates on a horizontal spring with period T = 2. 0 s. If a second identical block is glued to the top of the first block, the new period will be A. 1. 0 s B. 1. 4 s C. 2. 0 s D. 2. 8 s E. 4. 0 s © 2017 Pearson Education, Inc. Slide 15 -14

Quick. Check 15. 7 A block of mass m oscillates on a horizontal spring with period T = 2. 0 s. If a second identical block is glued to the top of the first block, the new period will be A. 1. 0 s B. 1. 4 s C. 2. 0 s D. 2. 8 s E. 4. 0 s © 2017 Pearson Education, Inc. Slide 15 -15

Quick. Check 15. 8 Two identical blocks oscillate on different horizontal springs. Which spring has the larger spring constant? A. The red spring B. The blue spring C. There’s not enough information to tell. © 2017 Pearson Education, Inc. Slide 15 -16

Quick. Check 15. 8 Two identical blocks oscillate on different horizontal springs. Which spring has the larger spring constant? A. The red spring B. The blue spring C. There’s not enough information to tell. © 2017 Pearson Education, Inc. Slide 15 -17

Quick. Check 15. 9 A mass oscillates on a horizontal spring. It’s velocity is vx and the spring exerts force Fx. At the time indicated by the arrow, A. vx is + and Fx is +. B. vx is + and Fx is –. C. vx is – and Fx is 0. D. vx is 0 and Fx is +. E. vx is 0 and Fx is –. © 2017 Pearson Education, Inc. Slide 15 -18

Quick. Check 15. 9 A mass oscillates on a horizontal spring. It’s velocity is vx and the spring exerts force Fx. At the time indicated by the arrow, A. vx is + and Fx is +. B. vx is + and Fx is –. C. vx is – and Fx is 0. D. vx is 0 and Fx is +. E. vx is 0 and Fx is –. © 2017 Pearson Education, Inc. Slide 15 -19

Quick. Check 15. 10 A mass oscillates on a horizontal spring. It’s velocity is vx and the spring exerts force Fx. At the time indicated by the arrow, A. vx is + and Fx is +. B. vx is + and Fx is –. C. vx is – and Fx is 0. D. vx is 0 and Fx is +. E. vx is 0 and Fx is –. © 2017 Pearson Education, Inc. Slide 15 -20

Quick. Check 15. 10 A mass oscillates on a horizontal spring. It’s velocity is vx and the spring exerts force Fx. At the time indicated by the arrow, A. vx is + and Fx is +. B. vx is + and Fx is –. C. vx is – and Fx is 0. D. vx is 0 and Fx is +. E. vx is 0 and Fx is –. © 2017 Pearson Education, Inc. Slide 15 -21

Quick. Check 15. 11 A block oscillates on a vertical spring. When the block is at the lowest point of the oscillation, it’s acceleration ay is A. Negative. B. Zero. C. Positive. © 2017 Pearson Education, Inc. Slide 15 -22

Quick. Check 15. 11 A block oscillates on a vertical spring. When the block is at the lowest point of the oscillation, it’s acceleration ay is A. Negative. B. Zero. C. Positive. © 2017 Pearson Education, Inc. Slide 15 -23

Quick. Check 15. 12 A ball on a massless, rigid rod oscillates as a simple pendulum with a period of 2. 0 s. If the ball is replaced with another ball having twice the mass, the period will be A. 1. 0 s B. 1. 4 s C. 2. 0 s D. 2. 8 s E. 4. 0 s © 2017 Pearson Education, Inc. Slide 15 -24

Quick. Check 15. 12 A ball on a massless, rigid rod oscillates as a simple pendulum with a period of 2. 0 s. If the ball is replaced with another ball having twice the mass, the period will be A. 1. 0 s B. 1. 4 s C. 2. 0 s D. 2. 8 s E. 4. 0 s © 2017 Pearson Education, Inc. Slide 15 -25

Quick. Check 15. 13 On Planet X, a ball on a massless, rigid rod oscillates as a simple pendulum with a period of 2. 0 s. If the pendulum is taken to the moon of Planet X, where the free-fall acceleration g is half as big, the period will be A. 1. 0 s B. 1. 4 s C. 2. 0 s D. 2. 8 s E. 4. 0 s © 2017 Pearson Education, Inc. Slide 15 -26

Quick. Check 15. 13 On Planet X, a ball on a massless, rigid rod oscillates as a simple pendulum with a period of 2. 0 s. If the pendulum is taken to the moon of Planet X, where the free-fall acceleration g is half as big, the period will be A. 1. 0 s B. 1. 4 s C. 2. 0 s D. 2. 8 s E. 4. 0 s © 2017 Pearson Education, Inc. Slide 15 -27

Quick. Check 15. 14 A solid disk and a circular hoop have the same radius and the same mass. Each can swing back and forth as a pendulum from a pivot at one edge. Which has the larger period of oscillation? A. The solid disk B. The circular hoop C. Both have the same period. D. There’s not enough information to tell. © 2017 Pearson Education, Inc. Slide 15 -28

Quick. Check 15. 14 A solid disk and a circular hoop have the same radius and the same mass. Each can swing back and forth as a pendulum from a pivot at one edge. Which has the larger period of oscillation? A. The solid disk B. The circular hoop C. Both have the same period. D. There’s not enough information to tell. © 2017 Pearson Education, Inc. Slide 15 -29

Quick. Check 15. 15 The graph shows how three oscillators respond as the frequency of a driving force is varied. If each oscillator is started and then left alone, which will oscillate for the longest time? A. The red oscillator B. The blue oscillator C. The green oscillator D. They all oscillate for the same length of time. © 2017 Pearson Education, Inc. Slide 15 -30

Quick. Check 15. 15 The graph shows how three oscillators respond as the frequency of a driving force is varied. If each oscillator is started and then left alone, which will oscillate for the longest time? A. The red oscillator B. The blue oscillator C. The green oscillator D. They all oscillate for the same length of time. © 2017 Pearson Education, Inc. Slide 15 -31