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  • The angular speed of the wheel of a vehicle is increased from 360 rpm to 1200 rpm in 14 second. Its angular acceleration is ,  Option: 1

The angular speed of the wheel of a vehicle is increased from 360 rpm to 1200 rpm in 14 second. Its angular acceleration is ,

 

Option: 1

28\pi \: rad/s^2
 


Option: 2

120\pi \: rad/s^2


Option: 3

1\; rad/s^2

 


Option: 4

2\pi \: rad/s^2


Answers (1)

best_answer

\omega _{initial}=360rpm=12\pi rad/s \\\omega _{final}=1200rpm=40\pi rad/s \\\because 1rpm= 2\pi rad/60 \\\text{Angular acceleration}= \frac{\Delta \omega}{\Delta t}=\frac{40\pi -12\pi }{\14}=2\pi rad/s^{2}

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HARSH KANKARIA

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