A block moves outward along the slot in the platform with a speed of r=(4t)m/s, where t is in seconds.

  

A block moves outward along the slot in the platform with a speed of r=(4t)m/s, where t is in seconds. the platform rotates at a constant rate of 6 rad/s. if the block starts from rest at the center, determine the magnitudes of its velocity and acceleration when t =1s.