The platform is rotating about the vertical axis such that at any instant its angular position is = (4/ /2 ) rad, where t is

The platform is rotating about the vertical axis such that at any instant its angular position is = (4/³^/2) rad,
where t is in seconds. A ball rolls outward along the radial
groove so that its position is r = (0.1t³) m, where t is in
seconds. Determine the magnitudes of the velocity and
acceleration of the ball when t = 1.5 s.

= 0.0