4. going back to the situation in question 1 (pipe narrows from an area of 2.0 cm2 to an area of 1.0 cm2 ; the speed of the water in the larger part of the pipe is 2.0 m/s. you already calculated the speed in the narrow part in question 1). the pipe is horizontal so the height of the water doesn’t change. suppose you measure the pressure in the larger part of the pipe to be 8,000 pa. what is the pressure in the narrow part

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.