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Recent questions tagged oscillations-and-waves

A light string of mass m and length L has its ends tied to two walls that are separated by the distance D . Two objects each of mass M are suspended from the string as shown in figure given . if a wave pulse is sent from point A find speed is AB string

asked Mar 25, 2014 by balaji.thirumalai

1 answer

Two wave pulse A & B are moving in opposite directions .along a taut string with a speed of 2.00 cm/sec . The amplitude of A is twice the amplitude of B . The pulse are shown in figure given at t=0 .Which is string shape of string at t=3 sec ?

asked Mar 11, 2014 by yamini.v

1 answer

The angular frequency 'w' of the system is

asked Mar 11, 2014 by yamini.v

1 answer

The equivalent spring constant of the system is

asked Mar 11, 2014 by yamini.v

1 answer

The equivalent spring constant for the system is

asked Mar 11, 2014 by yamini.v

1 answer

A light string of mass m and length L has its ends tied to two walls that are separated by the distance D. Two objects each of mass M are suspended from the string as shown in figure. if a wave pulse is sent from point A how long does it take to reach point B?

asked Mar 11, 2014 by yamini.v

1 answer

A rid of length l and mass is fixed at point O as shown in the figure and it is free to rotate about that point . Find the frequency (w) for small angular oscillation

asked Mar 11, 2014 by yamini.v

1 answer

If the per of human ear is 0.4 s and the minimum distance for an echo is 50 m . Then find the speed of sound in the medium

asked Mar 11, 2014 by yamini.v

1 answer

A light string with a mass per unit length of 8.00 g/m has its ends tied to two walls separated by distance equal to three - fourth the length of the string .An object of mass m is suspended from the center of the string , putting a tension in the string then transverse wave speed in the string as a function of hanging mass

asked Mar 10, 2014 by yamini.v

1 answer

A point source emits sound waves with an average power out-put of 8.0 w .Then find intensity at 3.0 m & distance at which the sound level is 40 dB

asked Mar 10, 2014 by yamini.v

1 answer

There is friction between M and ground and $\;(\mu_{s}=0.5)\;$ . There is no friction between m and ground . Find the maximum amplitude of S.H.M with which the block m vibrates so that the block M does not move ? $\;(g=10 m/s^2)$

asked Mar 10, 2014 by yamini.v

1 answer

Find the frequency heard by the observer if velocity of observer = 15 m/s, velocity of source = 20 m/s, frequency of sound source = 400 Hz and velocity of sound waves = 340 Hz

asked Mar 10, 2014 by yamini.v

1 answer

A block of mass '3 Kg' is dropped from a height of $\;\large\frac{10}{3}\;$mts onto a mass '7 Kg' which is attached to spring of spring constant 3 N/m initially at rest . The 3 Kg mass sticks to the 7 Kg mass and then the spring starts to stretch . Find the maximum extension of the spring . (Consider inelastic collision (e=0))

asked Mar 10, 2014 by yamini.v

1 answer

Eight blocks of masses m , 2m , 3m ,------,8m are placed on a table as shown in the figure .The table is smooth . The block 'm' is given a velocity $\;v_{0}\;$ which inturn hits '2m' and the process continues and finally the systems sticks to a spring of spring constant $\;K_{1}\;$ . Find the angular frequency (w) of the system . (Consider all collisions to be inelastic e=0 )

asked Mar 10, 2014 by yamini.v

1 answer

In the system shown the mass is at the centre on the turnatable is rotated at a constant angular speed 'w' . The equilibrium position is at (Consider the right side as positive x - axis and the springs are initially unstretched )

asked Mar 10, 2014 by yamini.v

1 answer

A disc of mass 'm' and radius 'r' is present on a rough surface . Find the angular frequency (w) of the S.H.M . Consider pure rolling of the disc

asked Mar 10, 2014 by yamini.v

1 answer

Find the time period of S.H.M for the following spring - mass system

asked Mar 9, 2014 by yamini.v

1 answer

A sound source of frequency 400 Hz is moving towards an observer with a velocity of 50 m/s while the observer is moving away from the source with a velocity of 40 m/s . Find the frequency heard by the observer . (Velocity of sound is 340 m/s )

asked Mar 9, 2014 by yamini.v

1 answer

A hollow sphere is tied to string and the system acts like a simple pendulum . Let the time period of the system be T . By doing which of the following , the time period of the system increases . (Do not consider extension of the string due to mass ) .

asked Mar 9, 2014 by yamini.v

1 answer

The system shown find the angular frequency (w) oscillation for S.H.M .

asked Mar 9, 2014 by yamini.v

1 answer

In an S.H.M if amplitude is 3 m and spring constant is 3 N/m and maximum velocity is 3 m/s , find the angular frequency (w) ?

asked Mar 9, 2014 by yamini.v

1 answer

Two sinusoidal machines are positioned the same distance from a worker . The intensity of sound delivered by each machine at the location of the worker is $\;2.0 \times 10^{-7}\;w/m^2\;$ . Find the sound level heard by the worker (i) when one machine is operating (ii) when both machines are operating

asked Mar 8, 2014 by yamini.v

1 answer

The sound source of frequency 400 Hz is moving towards as stationary observer with a velocity of 40 m/s . The frequency heard by the observer is (The speed of sound in medium is 340 Hz .)

asked Mar 8, 2014 by yamini.v

1 answer

An observer is moving towards a stationary source of frequency 320 Hz with a velocity of 10 m/s . The speed of sound in air is 343 m/s . The new frequency heard by the observer is

asked Mar 8, 2014 by yamini.v

1 answer

The intensity of a sound wave is $\;10^{-6}\;w/m^2\;$. The speed of the sound wave is 343 m/s . The intensity of the medium is $\;1.2\;Kg/m^3\;$. Find the $\;(\bigtriangleup p_{max})\;$ pressure amplitude of the sound wave

asked Mar 8, 2014 by yamini.v

1 answer

Sinusoidal waves 6 cm in amplitude are to be transmitted along a string that has a linear mass density of $\;4 \times 10^{-2} Kg/m\;$ . If the source can deliver a maximum power of 400 W and the string is under a tension of 100 N , what is the highest vibrational frequency at which the source can operate

asked Mar 8, 2014 by yamini.v

1 answer

A taut string for which $\;\mu=5\times 10^{-2} \;Kg/m\;$ is under as tension of 80 N . How much power must be supplied to the string to generate a sinusoidal wave at a frequency of 60 Hz and an amplitude of 6 cm ?

asked Mar 8, 2014 by yamini.v

1 answer

A spring-mass system is released from rest as shown in the figure . Initially the spring is unstretched . The equilibrium position of the system is at distance of from the initial state .$\;(g=10\;m/s^2)$

asked Mar 8, 2014 by yamini.v

1 answer

An ideal spring - mass system is oscillating . The one which remains some during the entire S.H.M period is

asked Mar 7, 2014 by yamini.v

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The time taken by a particle in S.H.M to reach from equilibrium position to one end is 25 s . The angular frequency w is

asked Mar 7, 2014 by yamini.v

1 answer

Which of the following is an example of S.H.M ( simple harmonic motion ) ?

asked Mar 7, 2014 by yamini.v

1 answer

The time period of a single pendulum is dependent on

asked Mar 7, 2014 by yamini.v

1 answer

A wave equation is given by $\;x_{1}=A \sin w(t-\large\frac{x}{K})\;$ where A is in mts , w is in Hz , x is in mts . The units of k are

asked Mar 7, 2014 by yamini.v

1 answer

Two waves of amplitudes 3 mts and 9 mts interfere . The resulting amplitude cannot be

asked Mar 7, 2014 by yamini.v

1 answer

4 waves $\;x_{1}=4 \sin5t\;, x_{2}= 8 \sin 5t\;, x_{3}=\cos 5t \;and\;x_{4}=4 \cos 5t \;$ interfere and if the final equation can be written in the form of $\;A \sin (5t+\sin^{-1}(\large\frac{B}{c}))\;$ , what is the sum of $\;A+B+C$ ?

asked Mar 7, 2014 by yamini.v

1 answer

The wave equation of 2 waves are given by $\;x_{1}=4 \sin 3t\; mts\;$ and $\;x_{2}=3 \cos 3t \;mts \;.$ The amplitude of the resulting wave is

asked Mar 7, 2014 by yamini.v

1 answer

The equation of motion of a particle is given by $x=4 sin(3t)$ mts where t is in seconds . The velocity of the particle at t=0 s is

asked Mar 7, 2014 by yamini.v

1 answer

20 waves of amplitudes 1 , 2 ...... , 9 , 20 mts are interfered . Maximum amplitude of the resulting wave is

asked Mar 7, 2014 by yamini.v

1 answer

In figure a block of mass 100 kg tied to a string of linear mass density 0.1 Kg/m . Find the frequency of the wave on the string if the length of the string is 2 mts ?

asked Mar 7, 2014 by yamini.v

1 answer

In figure a block of mass 100 kg tied to a string of linear mass density 0.1 Kg/m . Find the velocity of wave produced in the string ? (neglect string mass) $\;(g=10\;m/s^{2})$

asked Mar 7, 2014 by yamini.v

1 answer

A wave is reflected from a rigid support . The change of phase on reflection will be

asked Mar 7, 2014 by yamini.v

1 answer

Mr.A's voice has more frequency than Mr.B's voice . The velocity of Mr.A's voice is ------- than Mr.B's voice

asked Mar 7, 2014 by yamini.v

1 answer

At a pressure of 10 atm , the density of a certain gas is $\;1.4\times10^{-3}\;gm/cm\;$ . If the specific heat ratio for this gas is 1.4 , the velocity of sound in this gas is

asked Mar 7, 2014 by yamini.v

1 answer

In a stationary wave successive nodes and antinodes are separated by 25 cms . If the frequency of a vibrating particles is 250 Hz . The velocity of sound is

asked Mar 7, 2014 by yamini.v

1 answer

Density and youngs modulus of a certain hypothetical material are $\;5 \;gm/cm^{3}\;$ and $\;2\times10^{10} pa\;$ velocity of sound in this material is

asked Mar 7, 2014 by yamini.v

1 answer

At , atmosphere pressure and a certain temperature the velocity of sound is 350 m/s of a certain gas . For the same gas at same temperature the velocity of sound at 2 atm pressure is : (consider ideal gas)

asked Mar 7, 2014 by yamini.v

1 answer

Wavelength of a wave in a certain medium is 20 cm and its velocity is 350 m/s . The same wave is transmitted into a medium where the velocity is 1400 m/s . Its wavelength in the medium would be ?

asked Mar 7, 2014 by yamini.v

1 answer

A longitudinal wave of frequency 1000 Hz is travelling in a medium . At a certain point in the medium there is a compression at certain moment . How many milliseconds later would the next rare faction form at this place ? If the velocity of wave is 350 m/s , how for is the earlier compression at this time ?

asked Mar 7, 2014 by yamini.v

1 answer

A longitudinal wave of frequency 1000 Hz is travelling in a medium . At a certain point in the medium there is a compression at certain moment . How many milliseconds later would the next rare faction form at this place ?

asked Mar 7, 2014 by yamini.v

1 answer

When a damped spring mass system is forced into oscillations at different frequencies it resonates (amplitude increases and peaks when compared to input amplitude) at its damped natural frequency. For such systems the resonance of acceleration is more when

asked Dec 10, 2013 by meena.p

1 answer

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