A body of mass 0.6 kg rotates on the end of a helical spring of stiff ness 1.2 kN m -1 in a horizontal plane. The initial distance from the centre of rotation to the centre of the mass is 200 mm. What...

A body of mass 0.6 kg rotates on the end of a helical spring of stiff ness 1.2 kN m
^-1in a horizontal plane. The initial distance from the centre of rotation to the centre of the mass is 200 mm. What will be the radius of rotation of the mass and the stretch in the spring when the rotational speed is 300 rpm.