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No. Try that force balance again, and this time use a free body diagram on the block.Tanya Sharma said:When the elevator is not accelerating then ##Mg = V_1ρg## .
When the elevator is accelerating up then ##Mg = V_2ρ(g+a)## .
##V_1 = V_2(1+\frac{a}{g})## or ##V_1>V_2## . The displaced fluid when the elevator is accelerating is less i.e the block sinks less ( moves upwards ) as compared to when the elevator is at rest .
Is this what you are suggesting ?
Chet