In a lab experiment, a proton is shot directly to the right at 50,000 m/s towards another proton. After the collision, the first proton (the one initially moving) moves at an angle of 30° with respect to the +x axis at a speed of 43,300 m/s. Assuming an elastic collision, what is the velocity (magnitude and direction) of the second proton? Hint: Linear momentum is not the only conserved quantity in an elastic collision

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.

La olla es de metal por que se calienta mas rápido, y las manijas son de madera por que así no se calientas y tienden a estar mas frías.