In a gravity free space, man of mass M s...

In a gravity free space, man of mass `M` standing at a height `h` above the floor, throws a ball of mass `m` straight down with a speed `u`. When the ball reaches the floor, the distance of the man above the floor will be.

`h(1+m/M)`

`h(2-m/M)`

a function of M, h and u

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