(b) The equation of motion for the particles moving in a fluid under the action of a centrifugal field is similar to that for motion in the gravitational field, except that the gravitational acceleration g must be replaced by the centrifugal acceleration ro, where r is the radius of rotation and o is the angular velocity. Assuming that the particles are spherical and that the Re, < 0.1, show that dr ra where ur is the terminal velocity. [6] dt mCR-)w 2. my-