Explanation:
Formula to calculate angular acceleration is as follows.
![\Delta (\theta) = \frac{1}{2} \alpha \Delta t^{2} + \omega_{1} \Delta t](https://tex.z-dn.net/?f=%5CDelta%20%28%5Ctheta%29%20%3D%20%5Cfrac%7B1%7D%7B2%7D%20%5Calpha%20%5CDelta%20t%5E%7B2%7D%20%2B%20%5Comega_%7B1%7D%20%5CDelta%20t)
or, ![\alpha = \frac{2(\Delta (\theta) - \omega_{1} \Delta t)}{\Delta t^{2}}](https://tex.z-dn.net/?f=%5Calpha%20%3D%20%5Cfrac%7B2%28%5CDelta%20%28%5Ctheta%29%20-%20%5Comega_%7B1%7D%20%5CDelta%20t%29%7D%7B%5CDelta%20t%5E%7B2%7D%7D)
Putting the given values into the above formula as follows.
![\alpha = \frac{2(\Delta (\theta) - \omega_{1} \Delta t)}{\Delta t^{2}}](https://tex.z-dn.net/?f=%5Calpha%20%3D%20%5Cfrac%7B2%28%5CDelta%20%28%5Ctheta%29%20-%20%5Comega_%7B1%7D%20%5CDelta%20t%29%7D%7B%5CDelta%20t%5E%7B2%7D%7D)
=
= 0.326 ![rad/s^{2}](https://tex.z-dn.net/?f=rad%2Fs%5E%7B2%7D)
Thus, we can conclude that the wheel’s angular acceleration if its initial angular speed is 2.5 rad/s is 0.326
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1.Iron atoms tend to form regions, clusters. These are what become magnetized and then affected by magnetic fields
Answer 2
.When two magnets are brought near each other, like poles repel; opposite poles attract.
2) When a magnet is brought near a piece of iron, the iron also gets attracted to the magnet, and it acquires the same ability to attract other pieces of iron.