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

Ive done the first part of a question which was to derive the equation

[tex]\displaystyle{\theta(t) = \theta_0 \sin(\omega_0t + \phi)}[/tex]

for a pendulum

where [tex]\displaystyle{\omega_0 = \sqrt{\frac{g}{r}}}[/tex] and [tex]\displaystyle{\phi = \sin^{-1} \left(\frac{\theta_1}{\theta_0}\right)}[/tex]

[tex]r = \mbox{length of rod (pendulum)}[/tex]

The next part says

Sketch [tex]\theta(t)[/tex] versus [tex]t[/tex] for the cases [tex]\phi = 0[/tex] and [tex]\displastyle{\phi = \frac{\pi}{2}}[/tex]

How do I do this if i dont know [tex]\theta_0[/tex] or [tex]r[/tex]? I know they are both constant though, does this have a bearing on the situation?

Thankyou

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Graphing pendulum function

**Physics Forums | Science Articles, Homework Help, Discussion**