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!

Homework Help: SHM Amplitude Calculation

  1. May 7, 2010 #1
    My question is with part c, more specifically the calculating of the amplitude part.
    [PLAIN]http://img691.imageshack.us/img691/1750/shmquestion.jpg [Broken]

    The answer to the question is:
    [PLAIN]http://img80.imageshack.us/img80/8921/shmanswer.jpg [Broken]

    I do not understand how to arrive at this conclusion in order to calculate the amplitude; it baffles me. Any poking or prodding in the right direction (or even an outright answer) would be greatly appreciated.
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. May 7, 2010 #2
    Isn't the amplitude

    [tex]A = \sqrt{c^2_1 + c^2_2} [/tex]


    [tex]x(t) = c_1cos(wt) + c_2sin(wt) [/tex]
  4. May 7, 2010 #3
    I have no idea unfortunately. My question is how did the examiner arrive at the answer above (it is the verbatim answer for the past paper I'm currently working on).
  5. May 7, 2010 #4
    see the equilibrium point of smaller block is .05g/k = .01 m but initially it is at .03 m thus this excess distance is its amplitude . as after each oscillation it wll come back to this point .
  6. May 8, 2010 #5
    Thank you very much, that actually kind of makes sense now!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook