Question

85. A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. It
makes 14 revolutions in 22 s, then the acceleration of the stone is
(1) 5 m/s2
(2) 10 m/s
(3) 12.8 m/s
(4) None of these​

Answer 1

Explanation:

3 12.8 ms

I's the correct answer