A stream of water is leaking from the roof of a train into the cab below, to the dismay of the passengers in the cab. The train is moving with a constant speed of 100 km/hour. An observer from outside the train sees the situation through the train window as the train passes by. Which observer(s) see a parabolic path for the water as it moves through the air of the cab?
1.the passengers within the cab
2.neither the observer from outside the train nor the passengers within the cab
3.both the observer from outside the train and the passengers within the cab
4.the observer from outside the train
4
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