What is the moment of inertia of a pendulum with a mass of 8kg that is 6m from the pivot?

1 Answer
Jun 1, 2016

288kgm2

Explanation:

In the most simple form, this is an equation that you may use for this type of problem (simple pendulum):

I=mr2, where

    I: [moment of inertia](https://socratic.org/physics/rotational-motion/moment-of-inertia), kgm2
    m: mass of object, kg
    r: radius from pivotal point to the mass, m

I=mr2
I=(8kg)(6m)2
I=288kgm2

The following resources may help you further understand the concepts:
http://hyperphysics.phy-astr.gsu.edu/hbase/intcon.html#intcon
http://hyperphysics.phy-astr.gsu.edu/hbase/mi.html
https://en.wikipedia.org/wiki/Moment_of_inertia

Best of luck in your studies!

EDIT: the following response to the same question (with different values) has a lovely diagram which may further help enhance your understanding.
https://socratic.org/questions/what-is-the-moment-of-inertia-of-a-pendulum-with-a-mass-of-4-kg-that-is-4-m-from