9. (5 Pts.) A star with a radius R, 109 m is rotating with initial angular...

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Question

Answer 1

Answer #1

Since angular momentum is conserverd :

L_i = L_f

I_i $\omega$ _i = I_f $\omega$ _f

((2/5) M R_i² $\omega$ _i ) = (2/5) M R_f² $\omega$ _f

R_i² / R_f² = $\omega$ _f / $\omega$ _i

10¹⁸ / 10⁸ = $\omega$ _f / 10^-8

10² rad/s = $\omega$ _f

Answer 2

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