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qpham26

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## Homework Statement

Hi I was reviewing for my final and I came across this problem:

Problem:

Basically there is a 6in long cylinder with dia = 24in

Given weight density: 490 lb/ft^3

Each Hole is drilled symmetrically, each has 6in dia and equally space around a 10in dia circle concentric with the cylinder.

This is the picture of the frontview of the cylinder: https://lh4.googleusercontent.com/-8m1r4npC7cg/T11OqGF6qhI/AAAAAAAAABY/4v2HCrEqhd4/s333/cyinder.png Thanks for your time and consideration.

Appreciate it!

## Homework Equations

## The Attempt at a Solution

Approach

So what I would do is:

-First get that weight density into mass density by dividing it by 32.2

-Then find the mass of the cylinder without holes.

-Find mass of each holes.

-calculate the M of I of each hole about the center axis (parallel axis theorem)

-calculate the M of I of the whole solid cylinder (no holes)

-subtract the M of I of the holes from the whole cylinder

Will I get the correct answer based on the technique above?

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