- #1

geekie weekie

- 7

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This is a very basic question. Wikipedia says moment of inertia I of a point mass m is calculated as:

I = m * r^2

Where, r is distance from the axis of rotation. What this actually mean? I mean what is an r?

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- Thread starter geekie weekie
- Start date

- #1

geekie weekie

- 7

- 0

This is a very basic question. Wikipedia says moment of inertia I of a point mass m is calculated as:

I = m * r^2

Where, r is distance from the axis of rotation. What this actually mean? I mean what is an r?

- #2

DrClaude

Mentor

- 7,883

- 4,501

Where, r is distance from the axis of rotation. What this actually mean? I mean what is an r?

It is a distance, expressed in units of length (meters in the SI).

- #3

namanjain

- 70

- 0

this is axis of rotation and in front ist point mass not full stop .

it's at r dist from rod

I=mr

- #4

Vphysics2013

- 16

- 0

squared.So "r" is the distance of the mass "m" from the axis of roation.

- #5

sophiecentaur

Science Advisor

Gold Member

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