The angular speed of the wheel of a vehicle is increased from 360 rpm to 1200 rpm in 14 s. Its angular acceleration is [NEET 2020]

Initial angular speed of wheel,ω0=2πf0=2π×36060rad/s=12πrad/sFinal angular speed of wheel,ω=2πf=2π×120060rad/s=40πrad/st = 14 sFrom the equation of rotational motion,  ω=ω0+αt⇒  α=ω-ω0t=40π-12π14=28π14=2πrad/s2