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A disc of radius 0.1 m starts from rest ...

A disc of radius 0.1 m starts from rest with an angular acceleration of ` 4.4 rad//s^(2)` .Then linear velocity of the point on its after 5 s is

A

`0.22//s`

B

`2.2 m//s`

C

`4.4 m//s`

D

`1.1 m//s`

Text Solution

Verified by Experts

The correct Answer is:
B
`omega_(1)=0,omega_(2)=?`
` alpha = (omega _(2) - omega _(1))/(t)" " therefore omega _(2)= omega_(1)+alphat`
`=22`
`v_(2)=r omega _(2) =0.1xx22=2.2 m//s`
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