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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?

Respuesta :

Answer:

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

[tex]m_1v_1 + m_2v_2 = (m_1 + m_2) v[/tex]

just after collision of two cars they both comes to rest

so here we have

v = 0

Now we have

[tex]1000(5 mph) + 2000(v) = 0[/tex]

[tex]v = - 2.5 mph[/tex]

so Volkswagen must have to move with speed 2.5 mph

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