21actually its not sure whether this q itself is right or not......
@kaustab wats the sorce..........this q actually came in one of fiitjee aits
TWO THIN LIGHT RODS AB(mass M,lenmgth L)AND CD(mass 2M,length 2L)ARE CONNECTED TO MAKE A T AS SHOWN IN FIGURE.THE ASSEMBLY IS KEPT VERTICAL ON A FRICTIONLESS HORIZONTAL SURFACE AND IS RESTRAINED TO FALL SIDEWISE .WHAT IS THE LEAST VALUE OF F TO BE APPLIED AT B SUCH THAT B IS ABLE TO LEAVE CONTACT WITH THE SURFACE.
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