A stone ties to the end of a string $1\,m$ long is whirled in a horizontal circle with a constant speed. If the stone makes $22$ revolution in $44$ seconds, what is the magnitude and direction of acceleration of the stone
A stone ties to the end of a string $1\,m$ long is whirled in a horizontal circle with a constant speed. If the stone makes $22$ revolution in $44$ seconds, what is the magnitude and direction of acceleration of the stone
- [AIPMT 2005]
- A
$\frac{{{\pi ^2}}}{4}\;m{s^{ - 2}}$ and direction along the radius towards the centre
- B
${\pi ^2}\;m{s^{ - 2}}$ and direction along the radius away from the centre
- C
${\pi ^2}\;m{s^{ - 2}}$ and direction along the radius towards the centre
- D
${\pi ^2}\;m{s^{ - 2}}$ and direction along the tangent to the circle
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- [AIPMT 2011]
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