Anonymous asked in Science & MathematicsPhysics · 1 month ago

stumped on physics hw?

A 975-kg train car coats slowly (v=3.1 m/sec) under a hopper that fills it with coal. If the car's velocity shows to 1.2 m/sec, what mass of coal was loaded into it?

1 Answer

  • Anonymous
    1 month ago
    Favourite answer

    conserve momentum:

    975kg * 3.1m/s = (975kg + M) * 1.2m/s

    M = 1544 kg

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