Question
A disc of mass 1 kg and radius 0.1m is rotating with angular velocity 20 rad/s. What is angular velocity (in rad/s) if a mass of 0.5 kg is put on the circumference of the disc?
Joshi sir comment
by angular momentum conservation
I1ω1 = I2ω2
so [1(0.1)2/2]20 = [1(0.1)2/2+0.5(0.1)2]ω2
solve and get ω2
Read 1 Solution.
use conservatn of L Ie
mR2ω1= ( M+m)R^2 w2 find w new
SARIKA SHARMA 11 year ago
is this solution helpfull: 29 35