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

a steel disk 400mm in diameter and a mass of 48.98 kg accelerates from 6.28rad/s to 43.98rad/s calculate the change in angular momentum.

2. Relevant equations

final angular momentum = intial momentum

(I) final x (w) final = (i) initial x (w) intial

I= mr _2

3. The attempt at a solution

(I) initial = 48.98 x 200x10^-3_2 = 1.95 kgm_2/s

(I) final = (I) initial x (w) initial/ (w) final = 1.95 x 6.28/ 43.98 = 0.278 kg/m_2

change in angular momentum = final - initial

(I) initial x (w) initial - (I) final - (w) final

= 1.95 x 6.28 - 0.278 x 43.98 = 19.56 x 10 -3 kgm_2/s

can someone check if this correct thanx again....

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# Homework Help: Change in angular momentum

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