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Give the magnitude and direction of the net force acting on a stone of mass 0.1kg:- just after it is dropped from the window of a train running at a constant velocity of `36 km//h`, Neglect air resistance throughout.

Text Solution

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Since the train is running with constant velocity, therefore acceleration `a = 0 implies F = ma = 0`. No horizontal force acts on the stone. The net force acting on the stone is vertically downward (i.e.) F= 0.98 N (downwards).
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