I found your channel literally 3 days before JEE advanced, if I have gotten your channel before, I could've scored more, you really bring light to the complex concepts of physics, really appreciate it 😊
in the first problem i equated the vertical height of both the projectiles to get the relation btw velocity of ball and the stone. and put this velocity in the formula for time period of projectile. i get the same answer. is this approach correct?
At 2:20, the V_rel should not be horizontal as v1 equals V* and angle between those with the x axis is not same!! Then how will the ball hit the stone? Please check!!