Momentum & Impulse
mA v1 + mBv1 = mAv2 + mBv2
Practice Problem:
A 1.0 x 104-kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together when they collide, what is their speed after the collision?
24.0 m/s
1.0 x 104 -kg
1.0 x 104 -kg
(1.0 x 104 kg)(24.0 m/s) +(1.0 x 104 kg)(0.0 m/s) =
(1.0 x 104 kg)(v2) +(1.0 x 104 kg)(v2)
A
B
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