Answer:

Explanation:
Let's use the conservation of momentum to solve it.
(1)
- The total initial momentum will be:

- The total final momentum will be:
, but as they stick together after the collision, v1f = v2f = vf.
So we can rewrite (1), using the above information:




Finally, the magnitude of the velocity of the wreckage of the two cars immediately after the collision is:

I hope it helps you!
A wave transfers energy from the source outward in the
direction of wave motion.
To add, <span>in physics, a </span>wave<span> is an oscillation accompanied by a transfer of
energy that travels through a medium (space or mass). Frequency refers
to the addition of time.</span>