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.
• B. equal vertical ranges but different horizontal ranges.
• C. different vertical ranges but equal horizontal ranges.
• D. different vertical ranges and different horizontal ranges.

Answer 1

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