The car A of mass 1200 kg travelling at 30 m/s collides with another car B of mass 1800 kg at 20 m/s coming from the opposite direction. After collision, the velocity of car A becomes 25 m/s . Calculate the velocity of car B after collision.
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Answer:
by law of conservation of momentum
1200 × 30 + 1800 × 30 = 25 × 1200 + V × 1800
V = 5× 1200 + 1800 +11 /1800
V = 31,811÷1800
V = 17.672777777777 ~ 17.6728
V = 17.6728
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