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Question

A ball is thrown from rear end of the compartment of train to the front end which is moving at a constant horizontal velocity. An observer A sitting in compartment and another observer B standing on the ground draw the trajectory. They will have

A
equal horizontal and equal vertical ranges.
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B
equal vertical ranges but different horizontal ranges.
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C
different vertical ranges but equal horizontal ranges.
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D
different vertical ranges and different horizontal ranges.
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Solution

The correct option is B equal vertical ranges but different horizontal ranges.
In vertical direction, ball has zero initial velocity but same value of g w.r.t observer A & B,so they will draw trajectory of equal vertical range
But along horizontal direction, for observer A, ball is moving with velocity at which it is thrown w.r.t. train while for B, it is moving with a velocity equal to train + velocity at which it is thrown w.r.t groundtrain

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