An object of mass 0.77 kg is initially at rest. When a force acts on it for 2.9 ms it acquires a speed of 16.2 m/s. Find the magnitude (in N) of the average force acting on the object during the 2.9 ms time interval. (Enter a number.) N You hold your physics textbook in your hand. (Assume that no other objects are in contact with the book.) (a) Identify the forces acting on the book. (Select all that apply.) book on hand hand on book floor on book O earth on book (b) For each force you identified in part (a), indicate the direction. (If a force is not applicable, choose NA.) book on hand ---Select--- O hand on book ---Select--- @ floor on book --Select--- E earth on book V ---Select--- :......: up (c) Identify the ford down ur hand. (Select all that apply.) NA book on ham hand on book floor on hand earth on hand (d) For each force you identified in part (c), indicate the direction. (If a force is not applicable, choose NA.) book on hand ---Select--- O hand on book ---Select--- O floor on hand ---Select--- O earth on hand ---Select--- @ (e) Identify the forces that form the action-reaction pair as defined by Newton's third law. earth on hand ---Select--- hand on book ---Select