A stone tied to the end of a string of 1 m long is whirled in a horizontal circle with a constant spped. If the stone makes 22 revolutions in 44 s, what is the magnitude and direction of acceleration of the stone?

Options

(a) ?ￂﾲ/4 ms⁻² and direction along the radius towards the centre
(b) ?ￂﾲ ms⁻² and direction along the radius away from centre
(c) ?ￂﾲ ms⁻² and direction along the radius towards the centre
(d) ?ￂﾲ ms⁻² and direction along the tangent to the circle

Correct Answer:

?ￂﾲ ms⁻² and direction along the radius towards the centre

Explanation:

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