(adsbygoogle = window.adsbygoogle || []).push({}); 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?

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# Homework Help: Simple Harmonics Problem

Can you offer guidance or do you also need help?

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