The parking brake on a 1000 kgkg Cadillac has failed, and it is rolling slowly, at 5 mphmph , toward a group of small children. Seeing the situation, you realize you have just enough time to drive your 2000 kgkg Volkswagen head-on into the Cadillac and save the children. With what speed should you impact the Cadillac to bring it to a halt?

Volkswagen must have to move with speed 2.5 mph

Explanation:

As we know that two cars will collide and stick together

So here we can say that

just after collision of two cars they both comes to rest

so here we have

v = 0

Now we have

so Volkswagen must have to move with speed 2.5 mph

the answer is a)

mark brainliest

i believe the answer is a hope it and is correct