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 word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

the higher the current the higher the mag field around it the higher the influence on the compass