1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What is the acceleration of sound and what is the difference between acceleration an?

  1. Jun 18, 2010 #1
    What is the acceleration of sound and what is the difference between acceleration and velocity?

    I was researching online the acceleration of sound but I found no answer. I want to calculate
    the force of sound using F=ma, but I could not figure out the acceleration of sound. Along with trying to solve this problem I began thinking the difference between acceleration and velocity. I know the v=m/s and a=m/s^2. But if could someone please expand on what acceleration is and the main difference between velocity and acceleration.
     
  2. jcsd
  3. Jun 19, 2010 #2

    russ_watters

    User Avatar

    Staff: Mentor

    Re: What is the acceleration of sound and what is the difference between acceleration

    Sound is a wave. It doesn't have an acceleration. Acceleration is the time rate of change of velocity.
     
  4. Jun 19, 2010 #3
    Re: What is the acceleration of sound and what is the difference between acceleration

    Acceleration is the change of a velocity over an amount of time.
     
  5. Jul 10, 2012 #4
    Re: What is the acceleration of sound and what is the difference between acceleration

    Hello and sorry to pull this question out of the depths of age. But I was reasearching a similar thing.

    My issue with the quoted statment above is that, acceleration and velocity exist in sound especially considering common sounds are generated from a starting point.

    Not to mention the notion of time is actually age which ='s change of velocity over age or in the case of sound, age and distance traveled.
     
  6. Jul 10, 2012 #5

    sophiecentaur

    User Avatar
    Science Advisor
    Gold Member

    Re: What is the acceleration of sound and what is the difference between acceleration

    It has to be true that you could find the velocity in one medium, then in the next medium and then measure the time taken to cross the interface. Applying 'the formula' would give you an answer and it would be in metres per second squared BUT would this number be of any consequence? How wide would you say that the interface was? Your answer for acceleration would depend entirely on this choice but, if you said the interface has zero width, then the acceleration would be INFINITE. What would be the point?

    This is rather like many problems involving collisions of solid objects. They do change velocity during a collision but we would usually approach the problem in a way that didn't actually need to involve accelerations because the forces / distortions are not necessarily relevant to the answer. You can do it another way.
     
  7. Jul 10, 2012 #6
    Re: What is the acceleration of sound and what is the difference between acceleration

    Maybe if you specify what do you mean by "the force of sound" it will be a little more clear.
    The particles of the medium propagating a sound wave move with a variable velocity so they do have accelerations.
    The sound wave itself propagates with constant speed in a homogenous medium so there is no acceleration associated.
    Are you looking for the force exerted by a sound wave on a surface, maybe?
     
  8. Jul 10, 2012 #7

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

  9. Jul 10, 2012 #8
    Re: What is the acceleration of sound and what is the difference between acceleration

    This guy is money right here. Nasu must be right when saying is he looking for "force exerted by a sound on a surface."
     
  10. Jul 11, 2012 #9
    Re: What is the acceleration of sound and what is the difference between acceleration

    waves propogate from the origin, they do not accelerate.
    Sound waves propogate at the speed of sound - in whatever medium involved.
     
  11. Jul 11, 2012 #10

    sophiecentaur

    User Avatar
    Science Advisor
    Gold Member

    Re: What is the acceleration of sound and what is the difference between acceleration

    A good time to wait for a reaction from mapa, perhaps?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: What is the acceleration of sound and what is the difference between acceleration an?
Loading...