I have a rigid, massless strut of length 11m. A mass of 55kg is located on the free end, and another mass of 55kg is located at the midpoint. I'm having some trouble calculating the moment of inertia I for this physical pendulum.(adsbygoogle = window.adsbygoogle || []).push({});

I = [tex]\int r^{2} dm[/tex] (for continuous objects)

I = [tex]\sum m D[/tex] for all particles/objects composing the system.

I'm a little confused. Should I calculate I for each 55kg mass and add them together?

**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: Moment of inertia for physical pendulum

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