1. A body is dropped freely from the window of a train. Will the time of the free fall be equal, if the train is stationary, the train moves with a constant velocity, the train moves with acceleration?

Dear student,
Time of free fall depends on initial vertical velocity of body and vertical acceleration. Since initial vertical velocity will be zero for all three cases (because it is free fall) and also vertical acceleration will also be g , the time of free fall will be same for all three cases. 
Regards

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No , time of free fall wasn't equal
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i need full answer

 
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