(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two thin rectangular sheets (0.23 m 0.35 m) are identical. In the first sheet the axis of rotation lies along the 0.23 m side, and in the second it lies along the 0.35 m side. The same torque is applied to each sheet. The first sheet, starting from rest, reaches its final angular velocity in 6.5 s. How long does it take for the second sheet, starting from rest, to reach the same angular velocity?

2. Relevant equations

[tex]\tau=(mr^{2})\alpha[/tex]

[tex]E\tau=I\alpha[/tex]

[tex]I=(1/3)ML^{2}[/tex]

3. The attempt at a solution

I don't know how to start if you don't have a mass...or the angular acceleration

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Rotational Motion About a Fixed Axis

**Physics Forums | Science Articles, Homework Help, Discussion**