A stone tied to the end of a string of 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-

π2 ms–2 and direction along the tangent to the circle π2 ms–2  and direction along the radius towards the centre. π2 /4 ms–2  and direction along the radius towards the centre. π2 ms–2  and direction along the radius away from the centre.

π2 ms–2  and direction along the radius towards the centre.

\(a_r = w^2r = (2 \pi n)^2 r \) \(a_r = (2 \pi \frac{1}{2})^2 (1)\) = π2 ms–2  aT = 0