In outer space a rock with mass 4 kg, and velocity < 3900, -3000, 3200 > m/s, struck a rock with mass 17 kg and velocity < 300, -260, 260 > m/s. After the collision, the 4 kg rock's velocity is < 3500, -2300, 3700 > m/s.(adsbygoogle = window.adsbygoogle || []).push({});

What is the final velocity of the 17 kg rock?

m1 = 4 kg

v1 = < 3900, -3000, 3200 > m/s

m2 = 17 kg

v2 = < 3500, -2300, 3700 > m/s

Attempt at a solution:

pf = pi1 + pi2

(m1 + m2)*vf = m1v1 + m2v2

...solve for v2

as i was typing this i realized one of my mistakes is that the left side isn't (m1 +m2) but i'm still not sure what this should be?

Thanks for the help!:-)

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# Homework Help: Collisions thought i was doing it right?

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