knight ch14

Chapter 14

An object moves with simple harmonic motion. If the amplitude and the period are both doubled, the object’s maximum speed is

1. quartered.2. halved.3. quadrupled.4. doubled.5. unchanged.

An object moves with simple harmonic motion. If the amplitude and the period are both doubled, the object’s maximum speed is

1. quartered.2. halved.3. quadrupled.4. doubled.5. unchanged.

The figure shows four oscillators at t = 0. Which one has the phase constant

Four springs have been compressed from their equilibrium position at x = 0 cm. When released, they will start to oscillate. Rank in order, from highest to lowest, the maximum speeds of the oscillators.

1. c > b > a = d

2. c > b > a > d

3. d > a > b > c

4. a = d > b > c

5. b > c > a = d

1. c > b > a = d

2. c > b > a > d

3. d > a > b > c

4. a = d > b > c

5. b > c > a = d

Four springs have been compressed from their equilibrium position at x = 0 cm. When released, they will start to oscillate. Rank in order, from highest to lowest, the maximum speeds of the oscillators.

1. Velocity is positive; force is to the right.2. Velocity is negative; force is to the left.3. Velocity is negative; force is to the right.4. Velocity is zero; force is to the right.5. Velocity is zero; force is to the left.

This is the position graph of a mass on a spring. What can you say about the velocity and the force at the instant indicated by the dotted line?

1. Velocity is positive; force is to the right.2. Velocity is negative; force is to the left.3. Velocity is negative; force is to the right.4. Velocity is zero; force is to the right.5. Velocity is zero; force is to the left.

This is the position graph of a mass on a spring. What can you say about the velocity and the force at the instant indicated by the dotted line?

One person swings on a swing and finds that the period is 3.0 s. Then a second person of equal mass joins him. With two people swinging, the period is

1. 1.5 s.

2. <3.0 s but not necessarily 1.5 s.

3. 3.0 s.

4. >3.0 s but not necessarily 6.0 s.

5. 6.0 s.

One person swings on a swing and finds that the period is 3.0 s. Then a second person of equal mass joins him. With two people swinging, the period is

1. 1.5 s.

2. <3.0 s but not necessarily 1.5 s.

3. 3.0 s.

4. >3.0 s but not necessarily 6.0 s.

5. 6.0 s.

Rank in order, from largest to smallest, the time constants of the decays shown in the figure.

1. 2. 3. 4. 5.

Rank in order, from largest to smallest, the time constants of the decays shown in the figure.

Chapter 14Reading Quiz

What is the name of the quantity represented by the symbol

1. Angular momentum2. Angular frequency3. Phase constant4. Uniform circular motion5. Centripetal acceleration

What is the name of the quantity represented by the symbol

1. Angular momentum2. Angular frequency3. Phase constant4. Uniform circular motion5. Centripetal acceleration

What term is used to describe an oscillator that “runs down” and eventually stops?

1. Tired oscillator2. Out of shape oscillator3. Damped Oscillator4. Resonant oscillator5. Driven oscillator

What term is used to describe an oscillator that “runs down” and eventually stops?

1. Tired oscillator2. Out of shape oscillator3. Damped Oscillator4. Resonant oscillator5. Driven oscillator

The starting conditions of an oscillator are characterized by

1. the initial acceleration.2. the phase constant.3. the phase angle.4. the frequency.

The starting conditions of an oscillator are characterized by

1. the initial acceleration.2. the phase constant.3. the phase angle.4. the frequency.

Wavelength is

1. the time in which an oscillation repeats itself.

2. the distance in which an oscillation repeats itself.

3. the distance from one end of an oscillation to the other.

4. the maximum displacement of an oscillator.5. not discussed in Chapter 14.