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: Simple Harmonics Problem

  1. Feb 24, 2008 #1
    1. The problem statement, all variables and given/known data
    A SHM motion can be described by a=-400x. The amplitude is 8cm. Find the displacement and acceleration at a time of 2s.

    2. Relevant equations
    x = A sin(2pi f t)
    x = A cos(2pi f t)
    a=-(2pi f)squared*x

    3. The attempt at a solution
    Firstly I realised that 400=2pi f , so f =64Hz. But then I go stuck cos you don't know if this is a cos or sin oscillation. Im not sure where to go from here, but I just know theres a way around this.

    Any help?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted