Amass of 0.5 kg is whirled at 120 rpm in a horizontal circle at the end of a string 2 meters long. Neglecting the force due gravity, find: (a) the angular velocity (b) the centripetal acceleration.

Answer 1

angular velocity= 120rpm
Now if you want other units, convert, as here: 120rev/min *1min/60sec*2PI rad/rev

centripetal acceleration

a= m w^2 r

Answer 2

0.22