IF A BALLON WITH SAND IS COMING DOWN WITH UNIFORM VELOCITY.AFTER IT COMES DOWN HOW MUCH SAND SHOULD WE REMOVE FROM IT SO THAT IT GOES UP WITH UNIFORM VELOCITY?FORMULA?
IF A BALLON WITH SAND IS COMING DOWN WITH UNIFORM VELOCITY.AFTER IT COMES DOWN HOW MUCH SAND SHOULD WE REMOVE FROM IT SO THAT IT GOES UP WITH UNIFORM VELOCITY?FORMULA?