A stone tied to the end of string 80cm long is whirled in horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 sec, what is the magnitude of acceleration of the stone?
(a) 680 cm/s^2
(b) 860 cm/s^2
(c) 720 cm/s^2
(d) 990 cm/s^2
This question was addressed to me in semester exam.
My enquiry is from Motion in a Plane topic in portion Laws of Motion of Engineering Physics I