Question: (a) Derive Eq. (9.12) by combining Eqs. (9.7) and (9.11) to eliminate f (b) The angular velocity of an airplane propeller increases from 12.0 rad/s

(a) Derive Eq. (9.12) by combining Eqs. (9.7) and (9.11) to eliminate f
(b) The angular velocity of an airplane propeller increases from 12.0 rad/s to 16.0 rad/s while turning through 7.00 rad. What is the angular acceleration in rad/s3?

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