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anonymous
 one year ago
A 1000kg car traveling at 66 m/s hits a 2000kg car at rest and the two travel together after the collision. Calculate the speed with which they move.
anonymous
 one year ago
A 1000kg car traveling at 66 m/s hits a 2000kg car at rest and the two travel together after the collision. Calculate the speed with which they move.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0initial momentum = final momentum \[m_1v_1+m_2v_2=v_f(m_1+m_2)\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so 1000x2000 +2000x v2 =vf(3000) ???

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0No, pair the masses and velocities. So 1000 kg goes with 66 m/s and 2000 kg goes with 0 m/s (since the car is at rest) \[(1000~kg)(66~m/s)+(2000~kg)(0~m/s)=v_f(2000~kg+1000~kg)\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the only variable left if \(v_f\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so its 68000/3000 which equals 22.66 right ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.02000*0=0, so 66,000/3,000 = 22 m/s even

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thank you very much !!
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