What is the angular momentum of a rod with a mass of $7 kg$ and length of $6 m$ that is spinning around its center at $7 Hz$ ?

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Answer 1 · 2017-07-28T13:13:36

The angular momentum is $=923.6kgm^2s^-1$

The angular momentum is $L=Iomega$

The moment of inertia of a rod, rotating about the center is

$I=1/12*mL^2$

$=1/12*7*6^2= 21 kgm^2$

The angular velocity is

$omega=2pif=(2pi*7)=(14pi) rads^(-1)$

The angular momentum is

$L=Iomega=21*14pi=923.6kgm^2s^-1$

What is the angular momentum of a rod with a mass of 7 kg7 kg and length of 6 m6 m that is spinning around its center at 7 Hz7 Hz?