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**Angular acceleration - Please check if this is correct and...**

## Homework Statement

Question:

Each of the tires of a car makes 85.0 revolutions as the car reduces its speed uniformly from 90.0 km/h to 60.0 km/m, The tires have a diamater of .900m.

Find initial and final angular Velocities

Find the angular acceleration of tires in rad/s^2

My answers: Please tell me if that's right, because I have NO idea if its correct.