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A block of material of specific gravity ...

A block of material of specific gravity 0.4 is held submerged at a depth of 1m in a vessel filled with water. The vessel is accelerated upwards with acceleration of `a_(o) = g//5`. If the block is released at t = 0, neglecting viscous effects, it will reach the water surface at t equal to `(g = 10 m/s^(2))` :

A

0.60s

B

0.33s

C

3.3s

D

1.2s

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