A ball is thrown from the location 
of a horizontal playground with an initial speed 
at an angle 
from the 
-direction. The ball is to be hit by a stone, which is thrown at the same time from the location 
. The stone is thrown at an angle 
from the 
-direction with a suitable initial speed. For a fixed vo, when 
, the stone hits the ball after time 
, and when 
, it hits the ball after time 
. In such a case, is .
Text Solution
Verified by Experts2
(2)
Let 
: Ball
: Stone
vo: Initial speed of stone.
Since relative acceleration 
zero
Path seen would be straight line
To meet, 
And 
Case I: 
Case II 
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