answer of 6.00 was incorrect. Significant figures count, thanks! A uniform disk

Question

answer of 6.00 was incorrect. Significant figures count, thanks!

A uniform disk of radius 0.545 m and unknown mass is constrained to rotate about a perpendicular axis through its center. A ring with same mass as the disk's is attached around the disk's rim. A tangential force of 0.225 N applied at the rim causes an angular acceleration of 0.101 rad/s2. Find the mass of the disk. There is a hint available! View the hint by clicking on the bottom divider bar. Click on the divider bar again to hide the hint. Close

Explanation / Answer

0.225*0.545 = 0.101 * 3/2 * M * 0.545^2

so

m = 2.725 kg

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