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A stone tied to the end of a 20 cm long ...

A stone tied to the end of a 20 cm long string is whriled in a horizontal ciecle with a constant angular speed .If the centripetal acceleration is `980 cm//s^(2)`, its angular speed is .

A

`7"rad"//s`

B

`22//7 " rad"//s`

C

`49 " rad"//s`

D

`14 " rad"//s`

Text Solution

Verified by Experts

The correct Answer is:
A
`omega^(2).r=a_(r)implies" "omega^(2)=(9.8//20)xx 10^(2), omega= 7 " rad/s"`
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