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Wave : Chapter 15 and 16

Total questions: 40

Worksheet time: 1hrs 9mins

Name
Class
Date
1.
Phase shift means ...
a)
An up or down movement
b)
A left or right movement
c)
Height of graph
d)
...set Phasers to stun
2.

Identify the A in the sine function:
 y = 3 sin⁡(x + π) − 2y\ =\ 3\ \sin\left(x\ +\ \pi\right)\ -\ 2  

a)

3

b)

1

c)

 π\pi  

d)

-2

3.
What does a negative A value cause?
a)
A negative amplitude
b)
A reflection across the Y axis
c)
No effect
d)
A reflection across X axis
4.
Where does the graph of y=sin(x) begin its first cycle?
a)
(0,0)
b)
(1,0)
c)
(0,Pi)
d)
(1, Pi)
5.

Where does the graph of y=cos(x) begin its first cycle?

a)

(0,0)

b)

(0,1)

c)

(0, Pi)

d)

(1, Pi)

6.

What is the period for

y = 4 cos(x +π) - 2?

(Define your transformations first (a,b,c,d), and then determine which one of your answer choices matches the transformation for this function )

a)

2

b)

-2

c)

2π2\pi

d)

π\pi

7.
What is represented by the letter 'x'?
a)
Crest
b)
Compression
c)
Rarefaction
d)
Wavelength
8.
What is represented by the  letter 'y'?
a)
Compression
b)
Rarefaction
c)
Wavelength
d)
Amplitude
9.
What part is represented by the blue lines?
a)
Crest
b)
Resting Point
c)
Wavelength
d)
Amplitude
10.
What is represented by the blue lines?
a)
Trough
b)
Crest
c)
Wavelength
d)
Amplitude
11.
As the fire truck approached Mary, the pitch of the siren got higher. Once the fire truck passed and moved away, the siren's pitch got lower. This change in pitch is because of a change in the sound wave's
a)
concussion. 
b)
amplitude. 
c)
reflection.
d)
frequency. 
12.
Which statement about sound waves is true? 
a)
Air travels with them
b)
They travel through a vacuum
c)
They exist only if heard
d)
They can be reflected. 
13.
When comparing the two waves that are shown, how would Wave A (green wave) differ than Wave B (black wave)?
a)
Wave A and B have the same amplitude, but wave B (black) has a lower pitch.
b)
Wave A and B have the same amplitude, but Wave A has a lower pitch. 
c)
Wave A and B have the same pitch, but Wave A is a softer sound. 
d)
Wave A and B have the same pitch, but Wave B is a softer sound. 
14.
When a sound is louder what measurement gets bigger?
a)
Frequency 
b)
Amplitude 
c)
Wavelength 
d)
Crest
15.
If distance C on the diagram increased, what would happen to the pitch? 
a)
The pitch would be louder. 
b)
The pitch would be softer. 
c)
The pitch would be higher. 
d)
The pitch would be lower. 
16.
Sound is a form of _________________ that travels as waves through a ________________.
a)
light/ transparency
b)
energy/ vibration
c)
energy/ medium
d)
frequency/ medium
17.
Long sound waves are...
a)
high pitched
b)
low pitched
c)
medium pitched
18.
Short sound waves are...
a)
high pitched
b)
low pitched
c)
medium pitched
19.
When an ambulance move TOWARD you it sounds ________ pitched. 
a)
high
b)
low
c)
medium
20.
The Doppler effect is seen when a wave-making source moves toward an observer. 
a)
True
b)
False
21.
What can you tell about this object's motion?
a)
Moving to the North (up).
b)
Moving to the South (down). 
c)
Moving to the West (left). 
d)
Moving to the East (right). 
22.
What can you tell about the motion of this object?
a)
Moving left.
b)
Moving right quickly.
c)
Standing still. 
d)
Moving up slowly. 
23.
In the Doppler Effect Lab, we mostly observed changes in what?
a)
Velocity
b)
Wavelength
c)
Shape
d)
The Mouse Clicks
24.
A pair of trapeze performers at the circus is swinging from ropes attached to a large elevated platform. Suppose that the performers can be treated as a simple pendulum with a length of 16 m. Determine the period for one complete back and forth cycle.
a)
2 sec
b)
12 sec
c)
8 sec
d)
10 sec
25.

Based on your findings, which equation could best describe the pendulum’s period?

a)

A

b)

B

c)

C

d)

D

26.
The period of a pendulum may be decreased by
a)
Increasing the mass of the bob
b)
moving the equilibrium point
c)
decreasing the mass of the bob
d)
shortening the length of pendulum
27.

When is the pendulum at maximum velocity

a)

At its lowest point

b)

At its highest point

c)

It moves at a constant velocity

d)

It is at rest

28.

What are the two requirements for a simple harmonic oscillator?

a)

The object vibrates about the equilibrium point and the restoring force is proportional to the displacement

b)

The object moves left to right and the restoring force is proportional to the displacement

c)

The object vibrates about the equilibrium and the restoring force is greater than the displacement

d)

The object moves left to right and the restoring force is greater than the displacement

29.

The graph shows the variation with time of the displacement of an object undergoing simple harmonic motion. At which of the following time values is kinetic energy zero?

a)

0 ms

b)

40 ms

c)

80 ms

d)

100 ms

30.

Given an expression of x = 10 sin (0.25πt) where x in cm, t in second. Which of these answers are true?

a)

the frequency is 0.125 Hz

b)

the amplitude is 10 m

c)

the angular frequency is 0.125 rad s-1

d)

at t = 0, x = 10 cm

31.

Given an expression of a SHM

x = 10 sin (11.4t). Calculate the time taken when x=10 cm for the 1st time

a)

0.138 s

b)

1.24 s

c)

11.11 s

d)

0.79 s

32.

If a simple harmonic oscillator has a displacement of 0.02 m and acceleration equal to 2.00 m s-2, the angular frequency is equal to:

a)

10.0 rad s-1

b)

0.10 rad s-1

c)

100 rad s-1

d)

1.00 rad s-1

33.

Given equation of SHM, x=0.34 cos 3000t where x in mm and t in second. The frequency is:

a)

3000 Hz

b)

3000/2π Hz

c)

0.74/2π Hz

d)

3000/π Hz

34.

Diagram below shows an oscillating system.

Which graph shows the correct relationship between displacement and time for the oscillating system?

a)
b)
c)
d)
35.

The graph shows the variation in displacement with time for an object moving with simple harmonic motion. What is the maximum acceleration of the object?

a)

0.025 m s–2

b)

0.99 m s–2

c)

2.5 m s–2

d)

9.8 m s–2

36.

Two pendulums, P and Q, are set up alongside each other. The period of P is 1.90 s and the period of Q is 1.95 s.

How many oscillations are made by pendulum Q between two consecutive instants when P and Q move in phase with each other?

a)

19

b)

38

c)

39

d)

78

37.

An object is performing vertical SHM. X represents a position on its reference circle. Which point on the graph corresponds to X ?

a)

A

b)

B

c)

A or B

d)

C o D

38.

A mass is oscillating on a spring. Position X represents the point of

a)

maximum speed

b)

maximum downward acceleration

c)

maximum upward acceleration

d)

minimum displacement

39.

The graph shows the reducing amplitude of a body in SHM. This is known as

a)

dumping

b)

damping

c)

wetting

d)

doodling

40.

In SHM, at the amplitude position,

velocity is a ____________ and

acceleration is ____________.

a)

mimimum/ minimum

b)

minimum/ maximum

c)

maximum/ minimum

d)

none of the above

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