What is the moment of inertia of a pendulum with a mass of #8 kg# that is #1 m# from the pivot?
1 Answer
Apr 23, 2018
Explanation:
Taking the pendulum bulb as a point mass and the pivot as the rotational axis,
Moment of inertia of the bulb as a point mass: [1]
Note that the momentum of inertia expression can be derived using the parallel axis theorem: [2]
Where
Hence
Reference
[1] List of moments of inertia, the English Wikipedia, https://en.wikipedia.org/wiki/List_of_moments_of_inertia
[2] Parallel axis theorem, the English Wikipedia, https://en.wikipedia.org/wiki/Parallel_axis_theorem