7. A cubical block is floating in a liquid with half of its volume immersed in the liquid. When the whole system accelerates upwards with acceleration of g/3, the fraction of volume immersed in the liquid will be
(a) 1/2
(b) 3/8
(c) 2/3
(d) 3/4
Answer-a
(28)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)