WorksheetsPopup Quiz Vibrations 1
Total questions: 25
Worksheet time: 16mins
When there is a decrease in amplitude during each cycle of vibration, what is the term used to describe the body?
free vibration
forced vibration
damped vibration
none of the mentioned
In Which type of vibrations amplitude of vibrations goes on decreasing every cycle.
Damped vibrations
Undamped vibrations
Both a & b
None of them
Resonance is the phenomenon when frequency of external excitation force is
Twice the natural frequency of the system
Half the natural frequency of the system
Same as the natural frequency of the system
none of them
Natural frequency of the system is due to
Free vibrations
Forced vibrations
Resonance
Damping
The natural frequency of a spring-mass system on earth is N .The natural frequency of this system on the moon is
N
0.408N
0.204N
0.167N
The static deflection of a shaft under a flywheel is 4 mm. Take g = 10m/s2 . What is the critical speed in rad/s ?
50
20
10
5
dt2d2x+36x=0 is the equation of free vibrations of a system. Its natural frequency is (Rad/s)
36
6
9
0
Free vibration is vibration due to initial condition
Yes
No
Define Frequency
Time per cycle
Cycle per seconds
Maximum displacement
Total Cycle
Define Equilibrium Position
The point of zero displacement
Maximum displacement
total swing
Initial Position
Define Amplitude
The point of zero displacement
Maximum displacement of the object from its equilibrium position
total swing
Maximum displacement of the object from minimum displacement
Which of these is not Single Degree of Freedom System
Spring Mass System
Pendulum System
Motor pump system
Torsional System/ Shaft and Disc
A block which attached to a spring is displaced 20 cm downward from its equilibrium position and given an upward velocity of 2 m/s. What is the x(0) and v(0) respectively?
-0.2 m, 2 m/s
0.2 m, 2 m/s
-0.2 m, -2 m/s
0.2 m, -2 m/s
A string vibrates and produce 100 vibrations in 10 s. What is the frequency of the string?
0.1 Hz
1 Hz
10 Hz
1000 Hz
A box is raised from the ground up to 2.5 m above the ground. If the box's mass is 1 kg, what is the gain in potential energy?
g=10 s2m25 J
250 J
2500 J
2.5 kJ
A box initially has velocity 2 m/s then it speed up to 5 m/s. If the box has mass 1 kg. What is the change in kinetic energy?
3 J
21 J
10.5 J
1.5 J
A bee flies and the wings has frequency 20 Hz. What is the period of the wings?
0.1 s
1 s
0.5 s
0.05 s
An apple initially at rest drops from the top of the building with potential energy 100 J. What will be the kinetic energy of the apple when it reaches the ground? (no air resistance and
g=10 s2m )
Less than 100 J
Less than 50 J
More than 100 J
100 J
One marble has mass 10 g. A student brings 500 marbles from the ground to the height 50 cm. What will be the gain of potential energy for all marbles?
g=10 s2m2.5 J
2.5 kJ
0.25 kJ
250 kJ
The pendulum is released from A. One complete vibration is ...
from A to D
from A to G
from A back again to A
from A to F
occurs when a mechanical system is set off with an initial input and then allowed to vibrate freely.
Free Vibration
Forced Vibration
Harmonics
Resonance
occurs when an continuous force or motion is applied to a mechanical system.
Free Vibration
Forced Vibration
Harmonics
Resonance
are periodic vibrations.
Free Vibration
Forced Vibration
Harmonics
Resonance
is the tendency of a system to oscillate at maximum amplitude at a certain frequency.
Free Vibration
Forced Vibration
Harmonics
Resonance
equals 1 cycle per second (cps).
Resonance
amplitude
Harmonics
1 Hertz (Hz)
