i'm not even sure where to get started with this one because the thorton and marion classical dynamics book is really awful. BEGIN PROBLEM Suppose a baseball, which has a mass of 150 g and a diameter D of 7 cm is released from rest. For a sphere in air, the dynamic drag is F_d=.25 D^2 V^2 let F_d=kmv^2, find the terminal velocity of a baseball. END PROBLEM the question seems really vague given that we're not told if its being released in space, off of something, thrown or whatever. any suggestions? im lost as to how to approach this problem.