A3600 kg rocket traveling at 2900 m/s is moving freely through space on a journey to the moon. the ground controllers find that the rocket has drifted off course and that it must change direction by 11◦ if it is to hit the moon. by radio control the rocket’s engines are fired instantaneously (i. e., as a single pellet) in a direction perpendicular to that of the rocket’s motion. the gases are expelled (i. e., the pellet) at a speed of 4300 m/s (relative to the rocket). what mass of gas must be expelled to make the needed course correction? answer in units of kg.

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.