- #1
Nininguyen6
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Homework Statement
A solid disk is spinning around it center with an angular velocity of 35.0 rad/s. The disk has a mass of 3.6kg and a radius of .50m. You drop a thin ring with the same radius and a mass on the disk along the same center of rotation. What is the angular velocity of the disk and ring?
Homework Equations
Id= 1/2mR^2
Ir=mR^2
w=vf/R
The Attempt at a Solution
Id=1/2(3.6kg)(.50)^2 =.45 kg m/s
Ir= (3.6)(.50)^2= .90
W= (I'd+Ir)/ R
= (.45+.90)/(.50)
=2.7 rad/s
Is that the correct answer?