A rocket moving in free space has a speed of 2390 m/s relative to the Earth. Its engines
are turned on, and fuel is ejected in a direction
opposite to the rocket motion at a speed of
3070 m/s relative to the rocket.
What is the speed of the rocket relative to
the Earth once its mass is reduced to one half
its mass before ignition?
Answer in units of m/s.
part 2 of 2
What is the thrust on the rocket if it burns
fuel at the rate of 51.5 kg/s?
Answer in units of N.

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.