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Oscillations and waves: 4.1 to 4.3 Flashcards | StudBud
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Oscillations and waves: 4.1 to 4.3
Oscillations and waves: 4.1 to 4.3
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Answers
1
What happens during resonance?
Amplitude increases significantly
Wavelength increases significantly
Does not happen anything
2
Which one is correct?
D
A
B
C
3
If the displacement graph is: " " which would be the acceleration equation of the graph (SHM)
-w2Asin(wt)
-w2Acos(wt)
wAsin(wt)
-wAcos(wt)
4
Why the acceleration equation has a negative sign?
Because the speed diminishes
Because it is a scalar
Because acceleration is opposite direction to x
5
Which gives correctly the kinetic energy of the particle at its maximum x and in equilibrium?
D
A
B
C
6
Which one is the correct graph?
B
A
C
D
7
A pendulum swings back and forth in a circular arc between X and Y. The pendulum is:
always in equilibrium
in equilibrium as it passes the central point
never in equilibrium
only in equilibrium at X and Y
8
Which one is an example of lightly damping?
A pendulum that crashes against a wall
A pendulum that has resistance
A pendulum that goes through water
A pendulum that goes through oil
9
Graph shows how displacement varies with time for an object in SHM
A
B
D
C
10
Units of Frequency
seconds
seconds-1
ms-1
meters
11
Definition of Displacement according SHM
Distance between two points
The length and direction of a line drawn from the origin
Distance in a particular direction from its mean position
Is the velocity times the time
12
Which is correct in terms of K
E
and
P
E
as the block moves from X to Y
B
C
D
A
13
The direction of velocity of P?
D
C
A
B
14
Displacement of the object?
D
A
C
B
15
When does resonance occurs?
If the amplitude is small
If amplitude is big
If two frequecies are completely different
If two frequencies are equal or very similar
16
Parts of a wave
C-Crest, A-Wavelength, D-Trough, B-Amplitude
B-Crest, C-Wavelength, A-Amplitude, D-Trough
A-Crest, D-Wavelength, B-Trough, C-Amplitude
A-Wavelength, D-Crest, B-Amplitude, C-Trough
17
When does resonance should be avoided?
Radio
Constructions
Microwaves
18
Value of w
D
A
B
C
19
Which should be the frequency of the microwave?
A
D
B
C
20
An object undergoes SHM. The total energy of the object is proportional to:
D
A
C
B
21
Examples of SHM oscillations
object bobbing in water, the flight of a bird, bungee jump
Diving board, earthquakes, pendulum
musical instruments, plucking a string, fall of an object
spring, runnning, smashing a tennis ball with a racket
