Astudent presses a book between his hands, as the drawing indicates. the forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. the book weighs 32.9 n. the coefficient of static friction between his hands and the book is 0.416. to keep the book from falling, what is the magnitude of the minimum pressing force that each hand must exert?

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.