Question

A 10-kg disk-shaped flywheel of radius 9.0 cm rotates with a rotational speed of 320 rad/s. part a determine the rotational momentum of the flywheel.

Answer 1

The solution for the rotational flywheel is:

 

L = I x ω 

 

But we need to solve for l first, the computation is:

 

I = 1/2 m r^2 = 1/2 (10) (0.090^2) = 0.0405 kg*m^2 

ω = 320 rad/s 

So plugging in the information above, will give us:

 

L = 0.0405 * 320 = 12.96 kg*m^2/s or about 13 kg*m^2/s