A block of wood of dimension 20cmxx10cmxx5cm floating on water such that surface of maximum area is contact with water. What extra force, (over its weight) is required to just deatech the block from water surface given that surface tension of water is 72 dyne/cm.

A block of wood of dimension 20cmxx10cmxx5cm floating on water such th

1.	A block of wood of dimension 20cmxx10cmxx5cm floating on water such that surface of maximum area is contact with water. What extra force, (over its weight) is required to just deatech the block from water surface given that surface tension of water is 72 dyne/cm.
Answer» ANSWER :4320 DYNE