An Open Box-Car Has a Mass of 30,000 Kg and Is

question 28

Multiple Choice

An open box-car has a mass of 30,000 kg and is moving on a level railroad track at 4.00 m/s.1,000 kg of water falls straight down into the box-car.The velocity of the box-car after the water falls into the box-car is

• A) 7.01 m/s.
• B) 6.55 m/s.
• C) 5.02 m/s.
• D) 3.87 m/s.
• E) 2.89 m/s.

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