1. Not finding help here? Sign up for a free 30min 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!

Simple Harmonic Motion Question?

  1. Mar 10, 2015 #1
    1. The problem statement, all variables and given/known data
    A 0.500Kg object is undergoing simple harmonic motion at the end of a horizontal spring with force constant k=300N/m. When the object is 0.012m from the equilibrium position, it is observed to have a speed of 0.300m/s. What is:

    a) The total energy of the object at any point of its motion?

    b) The amplitude of the motion.

    c) The maximum speed attained by the object during its motion.

    Could you also please explain the steps? Thank you x

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Mar 10, 2015 #2

    BiGyElLoWhAt

    User Avatar
    Gold Member

    Hey kate, weclome to PF.
    We would love to help you with this, but, unfortunately, you seem to have forgotten provide your attempt at the solution!
    Let's start with part A. What do you know about the total energy at anypoint in it's motion?
     
  4. Mar 10, 2015 #3
    Hello, I apologize, I am very much new to this site. For the total energy, I tried using the 1/2KA^2 equation, however I got stuck as I didn't know how to find the amplitude?
     
  5. Mar 10, 2015 #4

    BiGyElLoWhAt

    User Avatar
    Gold Member

    What kind of energies does the block have at the observed location?
    And that's no problem, that's why I was gentle :P
     
  6. Mar 10, 2015 #5
    Haha thank you :) Umm the block possess Kinetic Energy?
     
  7. Mar 10, 2015 #6

    BiGyElLoWhAt

    User Avatar
    Gold Member

    Is that the only kind? I believe it is attached to a spring, right? What's that 1/2 k A^2 equation represent that you tried using?
     
  8. Mar 10, 2015 #7
    That represnets Total Energy which is the kinetic energy added to the potential energy?
     
  9. Mar 10, 2015 #8

    BiGyElLoWhAt

    User Avatar
    Gold Member

    True. I'll just throw this out there, because I'm unsure how to allude to it: 1/2 k A^2 is the total energy, but it is a special case. It's when the object has 0 kinetic energy, and it's all stored in potential. What's the velocity at the amplitude?

    So while it is equal to the total energy, what does it actually represent?
     
  10. Mar 10, 2015 #9

    BiGyElLoWhAt

    User Avatar
    Gold Member

    Awww... don't give up on me kate.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Simple Harmonic Motion Question?
Loading...