Question

Helping a friend out.. Help!
https://gyazo.com/7ce8c41f02c382fe664abf7906ef1fc8

Answer 1

to start you off, use the standard shm equation

\(x(t) = A \cos (\omega t + \phi) \)

\( \dot x(t) = -\omega A \sin (\omega t + \phi)\)

\(\ddot x(t) = - \omega^2A \cos (\omega t + \phi)\)

\(1 \le \cos (\omega t + \phi) \le 1\), and you know A and \(\ddot x_{max}\), so you can now get \(\omega\) and thus \(T\)

Answer 2

\(\color{red}{-}1 \le \cos (\omega t + \phi) \le 1\)