The magnitude of the buoyant force on the block will be 5 N. Resultant force on the block is zero.
Buoyant force also known as upthrust, is an upward force exerted by a fluid that resists the weight of a partly or completely submerged object.
The weight of the overlying fluid causes pressure to rise with depth in a column of fluid.
The buoyant force on an object fully submerged in a liquid depends on the object's volume. And the density of the liquid.
If the block is not accelerating the net force is to act on the block is zero.
[tex]\rm F_{net}=0\\\\F_B-W=0\\\\F_B=W\\\\ F_B=5\ N[/tex]
Hence,the magnitude of the buoyant force on the block will be 5 N.
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