A small block of wood of specific gravity 0.5 is subnerged at a depth of 1.2 m in a vessel filled with water. The vessel is accelerated upwards with an acceleration `a_(0) = (g)/(2)`. Time taken by the block to reach the surface, if it is released with zero initial velocity is `(g = 10 m//s^(2))`
A. 0.6 s
B. 0.4 s
C. 1.2 s
D. 1 s
