(Answered) A 6000nbspkgnbspopen train car is rolling on frictionless

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A 6000 kg open train car is rolling on frictionless rails at 25.0 m/s when it starts pouring rain. A few minutes later, the car's speed is 20.0 m/s.

What mass of water has collected in the car?

Express your answer to three significant figures and include the appropriate units.

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