A block of mass m is pushed towards a mo...

A block of mass `m` is pushed towards a movable wedge of mass `nm` and height `h`, with a velocity `u`. All surfaces are smooth. The minimum value of `u` for which the block will reach the top of the wedge is

`2sqrt(gh)`

`sqrt(3gh)`

`sqrt(6gh)`

`sqrt((3)/(2)gh)`

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