- #1
24forChromium
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Homework Statement
What is the angular inertia of a disk (cylinder) with...
Maximal radius, rmax = 10cm
Thickness, h = 4cm
density, d = 3g/cm3
rotational axis in its centre (like the axis of clock hand in a disk shaped clock)
Please show and explain your procedure in finding the answer.
Homework Equations
Angular inertia of point mass = (radius from rotational axis)2 × mass of point mass
The Attempt at a Solution
I see that this question obviously involve calculus, but I don't have any real understanding of calculus. I think we need to consider the cylinder as composed of infinitely many concentric tubes each with a negligible volume (the distance between the tubes' inner and outer radius is assumed to be zero) and then add the individual angular inertia of all of the tubes.
I apologize for any spelling/grammar mistake and any misuse of terminology, please explain any calculus stuff that you would use.
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