Ok, in this problem I am getting bogged down in the basic algebra part of it. I had one person explain it once but I still missed something.(adsbygoogle = window.adsbygoogle || []).push({});

a 1055-kg van, stopped at a traffic light, is hit directly in the rear by a 715-kg car traveling with a velocity of +2.26 m/s. Assume that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic. What is the final velocity of (a) the car and (b) the van?

m1 = 715 kg

m2 = 1055 kg

vo1 = +2.25 m/s

vo2 = 0 m/s

vf1 = ?

vf2 = ?

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# Impulse and Momentum: Substitution Trouble

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