14,200 kg railroad cart that is traveling at a speed of 24.0 m/s collides with a 11,500 kg cart that is at rest. If the two carts lock together as a result of the collision, then what is their speed just afterward? If the second cart (in question 7) had been moving at 14.0 m/s (in the same direction as the first) before the collision, then what would be their speed just after the collision if they lock together?

Principles of Physics: A Calculus-Based Text
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Chapter8: Momentum And Collisions
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7 and 8 are together

7. 14,200 kg railroad cart that is traveling at a speed of 24.0 m/s collides with a 11,500 kg cart that
is at rest. If the two carts lock together as a result of the collision, then what is their speed just
afterward?
8. If the second cart (in question 7) had been moving at 14.0 m/s (in the same direction as the first)
before the collision, then what would be their speed just after the collision if they lock together?
Transcribed Image Text:7. 14,200 kg railroad cart that is traveling at a speed of 24.0 m/s collides with a 11,500 kg cart that is at rest. If the two carts lock together as a result of the collision, then what is their speed just afterward? 8. If the second cart (in question 7) had been moving at 14.0 m/s (in the same direction as the first) before the collision, then what would be their speed just after the collision if they lock together?
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