Bodies a and b have equal mass. body b is initially at rest. body a collides with body b in a one-dimensional elastic collision. which statement is true?
a. body a comes to rest body b starts moving with initial velocity of body a
b. the momentum of the system is not conserved
c. the kinetic energy of the system is not conserved
d. the final velocity

According to the statement " Collision between two bodies in which the total kinetic energy of the two bodies after the collision is equal to their total kinetic energy before the collision."
The best answer is :
Option A " BODY A COMES TO REST BODY B STARTS MOVING WITH INITIAL VELOCITY OF BODY A "

After looking on the scaleattached with the question I recognized the right answer in the first option represented above. A. BODY A COMES TO REST BODY B STARTS MOVING WITH INITIAL VELOCITY OF BODY A - is definitely the only correct answer which perfectly concides with the given task.Hope you still need the answer it because this one I gave you is really useful.

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.