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A stone tied to the end of a string 80 c...

A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, the magnitude of acceleration is :

A

`680 cm s^-2`

B

`720 cm s^-2`

C

`860 cm s^-2`

D

`990 cm s^-2`

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SL ARORA-Motion in a Plane-Excercise
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