The weight of a block in air is 60 N. When it is immersed completely in water its weight is 52 N. Buoyant force on the block is (in Newton) :

Foundation

Physics Foundation

Floatation

Question

112

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The weight of a block in air = 60 N.
Let the buoyant force on block by water is F_W.
$∵$ F_Apparent = F_air– F_buoyant
F_buoyant= F_air – F_Apparent = 60 N – 52N = 8N

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