Question

A uniform disc and a hollow right circular cone have same formula for their M.I , when rotating about their central axis. Why is it so?

Answer 1

Answer:

I will give you a logical explanation for this

If you cut every cross section of the hollow cylinder horizontally and put every piece of circle adjacently you will notice it forms a disc which is equal to MR^2/2.

Answer 2

Answer:

Answer in attachment

Explanation:

ᴍʀᴋ. ᴛʜᴀɴᴋs ᴀɴᴅ ʙʀᴀɪɴʟɪsᴛ