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A wheel is making revolutions about its ...

A wheel is making revolutions about its axis with uniform angular acceleration. Starting from rest, till it reaches 100 rev/sec in 4 seconds. Find the angular acceleration.

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The correct Answer is:
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Given that `omega_0=0`
`omega=100 rev/s`
`omega=omega_0+alphat`
`: alpha=omega/t`
`alpha=100/4rev/s^2=25 rev/s^2`
`thet=theta_0t+1/2alphat^2`
`=1/2x25xx16`
`=200 degre
`200xx2pi radians
`=400 pi radians`.
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