A 4500kg open train car is rolling on frictionless rails at 21.0m/s when it starts pouring...
A 4500kg open train car is rolling on frictionless rails at 21.0m/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?
Homework Answers
Momentum before = MOmentum after
mv = mv
4500 x 22 = Y x 20
94500 = 20Y
Y = 4725kg
Mass of Rain = Mass of Train after - Mass of Train before =
4725-4500 = 225kg
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